Chapter 2: What This Is—and What It Isn’t
Three people can say the same sentence and mean three very different things.
“I can’t stop thinking about them.”
For one person, it means:
I met someone six weeks ago, I’m falling in love, and everything feels new.
For another:
I love my partner, but I keep having intrusive doubts about whether I really love them enough. I check my feelings constantly because I need to know for sure.
For someone else:
They are the first person I think about when I wake up and the last person I think about before I sleep. I study every interaction for evidence they might want me back. When they seem close, I feel almost euphoric. When they pull away, I can barely focus.
On the surface, all three people are preoccupied with romance.
Underneath, different processes may be at work.
That distinction matters because psychological experiences cannot be identified by one behavior alone.
Checking a phone can mean excitement.
Fear.
Habit.
OCD.
Loneliness.
Avoidance.
Jealousy.
Or nothing particularly important.
The useful question is not simply:
What are you doing?
It is:
What function is the behavior serving, and what happens if you cannot do it?
This chapter is not going to give you a flowchart that ends with a diagnosis.
That would promise more certainty than the evidence can support.
Instead, we are going to look at several experiences that can resemble limerence and ask a more careful question:
What seems to be driving the loop?
Intense attraction is not automatically limerence
Early romantic attraction can be wonderfully unreasonable.
People think about one another constantly.
They lose sleep talking.
They reread messages because the messages make them happy.
They daydream.
They idealize.
They want to be close.
They feel a rush when affection is returned.
Research on romantic love has long described focused attention, intrusive thinking, idealization, emotional dependence, and longing for emotional union as common parts of passionate attraction. 8
That creates an immediate problem for anyone trying to define limerence as “thinking about someone all the time.”
People in love do that too.
A better distinction is flexibility and cost.
Imagine Elena.
She has been dating Sam for two months.
She thinks about Sam while driving home. She gets excited when Sam’s name appears on her phone. She tells her sister far too many details about their dates.
Sam sometimes takes hours to respond.
Elena notices.
She occasionally wonders whether Sam is losing interest.
Then she finishes dinner, walks the dog, answers work emails, calls a friend, and returns to the rest of her life.
Her attraction is intense.
But it has not become the organizing principle of her emotional world.
She does not need to repeatedly inspect the relationship to keep herself steady.
She can tolerate some uncertainty without trying to solve it all night.
Contrast that with Riley.
Riley’s attraction to Avery is beginning to affect sleep, attention, mood, the relationship with Morgan, and the ability to leave questions unanswered.
The amount of feeling is not the only difference.
The relationship between feeling and functioning has changed.
That is why it can be more useful to ask:
How much room does this feeling leave for the rest of your life?
rather than:
How intense is it?
Infatuation, passion, and limerence
The word infatuation often gets used as an insult.
“You’re not in love. You’re just infatuated.”
That distinction is usually much too neat.
Infatuation can be a normal part of attraction. It may be intense, idealized, sexual, exciting, and temporary. Sometimes it develops into lasting love. Sometimes it fades as reality becomes clearer. Sometimes it ends painfully.
Limerence overlaps with this territory.
The difference is not that infatuation is fake while limerence is pathological.
Research is not yet strong enough to draw a bright scientific line between every form of romantic intensity. Even recent measurement work has had to make specific choices about who counts as a limerent participant. In the 2025 LQ-11 research, for example, participants were asked about intense adoration toward someone with whom they were not in an intimate relationship. 9
That is useful for research.
It does not settle every real-life case.
Some people describe limerent patterns involving ex-partners.
Some describe the pattern continuing after partial reciprocation.
Some become fixated on someone while already having a sexual or emotional relationship with them, especially when commitment remains uncertain.
The boundaries of the concept are still being worked out.
So throughout this book, I am less interested in policing the word than in identifying the pattern that creates suffering.
If your experience involves recurring preoccupation, dependence on signs of reciprocation, difficulty tolerating uncertainty, increasing fantasy or checking, and meaningful interference with the rest of your life, then the tools in this book may be useful even if your experience does not fit every research definition perfectly.
Unrequited love is not always limerence
Loving someone who does not love you back can be devastating.
There is no need to make the grief pathological before we take it seriously.
You may know the relationship is impossible and still miss the person every day.
You may cry.
You may dream about them.
You may need months to stop expecting their name to appear on your phone.
That can be heartbreak.
Heartbreak hurts because attachment hurts when it is broken.
Limerence can overlap with unrequited love, but there is often a different mental quality when the attachment becomes dominated by unresolved possibility and repeated interpretation.
Imagine two people after rejection.
The first thinks:
I wish they had chosen me. I still love them. I know they don’t want this, and I hate that I have to let go.
The second thinks:
They said they can’t be with me right now, but what exactly does “right now” mean? They cried when they said it. If they felt nothing, why would they cry? Maybe this is about timing. Maybe they need space. Maybe if I stay present without pushing—
Both people are grieving.
The second person is also keeping possibility alive through interpretation.
That does not make them foolish.
Hope is difficult to put down when reality leaves even a small opening—or when the mind can create one.
One of the hardest parts of recovery can be learning that grief often requires an answer that hope keeps appealing.
You do not need to stop loving someone before you accept what is available.
Those are separate processes.
Anxious attachment is broader than one person
Attachment theory is one of the most common explanations people encounter when researching limerence.
There is a reason for that.
Attachment anxiety describes a pattern in which closeness can feel uncertain and rejection or abandonment carries a great deal of emotional threat. People higher in attachment anxiety may seek more reassurance, worry more about a partner’s availability, and react strongly to perceived distance.
Recent limerence research does support a connection, but not a simple one.
In the 2025 LQ-11 study, attachment anxiety was associated with the scale’s intense-attachment dimension, but it was not significantly related to the neglect dimension. Avoidant attachment was not significantly associated with either factor. 10
The newer 2026 research also found elevated insecure attachment among participants reporting impairing limerence. 11
That makes attachment relevant.
It does not make attachment the whole explanation.
One helpful distinction is scope.
Anxious attachment often appears as a broader relational pattern.
You may worry across close relationships that people will leave.
You may need repeated reassurance from a committed partner.
You may become distressed when friends seem distant.
Limerence, by contrast, often creates extraordinary concentration around a particular person and the possibility of reciprocation.
The two can absolutely overlap.
For Riley, perhaps they do.
Riley may already carry a deep sensitivity to being left and then encounter Avery at exactly the right moment for that sensitivity to attach itself to a new possibility.
But someone else may have relatively secure long-term relationships and still become limerent during an unusual period of loneliness, change, novelty, or emotional deprivation.
This is why attachment style should not become another horoscope.
You are not a type.
You are a person with patterns that may become more or less active in different relationships and different seasons of life.
We will explore attachment much more deeply later.
For now, the important distinction is this:
Attachment may help explain why uncertainty hurts so much. It does not automatically explain why this particular person became the center of it.
Relationship OCD: when the question itself becomes the trap
Relationship obsessive-compulsive disorder, commonly shortened to ROCD, is another experience that can look similar from the outside.
ROCD is not simply “overthinking your relationship.”
It refers to obsessive-compulsive symptoms centered on a romantic relationship or partner.
Obsessions are recurring intrusive thoughts, doubts, images, or urges that create significant distress. Compulsions are behaviors or mental acts used to reduce that distress or gain certainty.
A person with relationship-centered ROCD might repeatedly wonder:
Do I really love my partner?
Are they the right person?
What if I’m making a terrible mistake by staying?
What if I don’t feel enough?
Another person may become fixated on perceived flaws in the partner:
Are they attractive enough?
Intelligent enough?
Emotionally stable enough?
The person may repeatedly check their feelings, compare the partner with other people, ask for reassurance, review memories, or test whether the relationship “feels right.”
Clinical research on ROCD has found that these symptoms can produce distress and impairment comparable with other OCD presentations. 12
There is obvious overlap with limerence.
Both can involve repetitive thinking, checking, reassurance seeking, intolerance of uncertainty, close attention to another person’s behavior, and a desperate desire to know.
But the central questions often differ.
In ROCD, the mind may demand certainty about the relationship itself:
Is this right?
Do I love them enough?
Are they good enough?
What if I’m making the wrong choice?
In limerence, the mind is often pulled toward reciprocation and possibility:
Do they want me?
Could this happen?
What did that interaction mean?
A shorthand I sometimes use is:
ROCD can become a doubt loop. Limerence can become a hope loop.
That is a useful memory aid.
It is not a diagnostic law.
Real OCD can contain hope. Limerence contains plenty of doubt. And someone can experience both.
There is another difference that often matters.
ROCD obsessions are commonly experienced as ego-dystonic. That term means the thoughts feel unwanted, inconsistent with the person’s values, or out of step with what they believe they truly want. Research describes people with ROCD who love their partners but feel tormented by recurring doubts that they cannot settle. 13
Limerent fantasies, especially early on, may feel more ego-syntonic, meaning they line up with what the person wants.
You may hate the intensity.
You may hate losing sleep.
You may hate checking.
But you probably do not hate the idea that Avery might love you back.
That difference matters.
Still, do not use it to self-diagnose.
If obsessive thoughts and compulsions are consuming large amounts of time or causing significant distress, an OCD-informed clinician can help determine what is actually happening.
Mislabeling OCD as limerence can delay treatment that has a much stronger evidence base.
The “Favorite Person” idea
If you spend time in mental health communities online, especially communities centered on borderline personality disorder, you may have heard the term Favorite Person, often shortened to FP.
People use the phrase in different ways.
It often describes a relationship in which one person becomes unusually central to emotional stability, identity, reassurance, or fear of abandonment.
That can sound very similar to limerence.
Sometimes it is.
Sometimes it is not.
The important thing to know is that “Favorite Person” is community language, not a formal diagnosis.
It should not be treated as a symptom that automatically proves somebody has borderline personality disorder.
Nor should every intense dependency be collapsed into limerence.
One potentially useful distinction is the emotional job the relationship is performing.
In a Favorite Person-type dynamic, the relationship may function primarily as an attachment and regulation system:
I need you close so I feel safe.
Limerence may be organized more strongly around hoped-for reciprocation:
I need to know that you might choose me.
But again, real human beings refuse to stay inside tidy boxes.
Someone may experience both.
They may be romantically limerent toward a person who also serves as their primary source of emotional regulation.
Or a close attachment may become romanticized over time.
The point is not to win a naming contest.
The point is to understand the mechanism well enough to respond to it.
Autistic intensity should not be mistaken for pathology
There is another area where we need to be especially careful.
Autistic people can have deep, focused interests. These interests may be joyful, regulating, absorbing, meaningful, and central to identity.
Sometimes the subject of intense interest can involve another person: a public figure, character, artist, historical person, friend, mentor, or someone fascinating to know.
Online, people may describe this with terms such as “person hyperfixation” or “human special interest.”
Those descriptions can be meaningful as lived experience.
They are not established clinical categories.
That distinction matters because psychological language has a bad habit of turning intensity into illness when the person experiencing it is neurodivergent.
Thinking about somebody frequently does not automatically make the interest unhealthy.
Learning everything about someone does not automatically mean you want romantic reciprocation.
Feeling energized by a person does not automatically mean your attachment system is in crisis.
Autistic intense interests can be wanted and deeply rewarding. Research comparing repetitive experiences in autism and OCD, for example, has highlighted the importance of whether an experience feels pleasurable and self-consistent or intrusive and distressing, while also acknowledging that overlap can occur. 14
A more useful question is:
What is the focus doing?
Does thinking about this person bring curiosity, pleasure, inspiration, structure, or connection?
Or has the focus become increasingly dependent on whether they respond, approve, reciprocate, remain available, or choose you?
Can you enjoy the interest while respecting their separateness?
Can they disappoint you without destabilizing your identity?
Can they have a private life without it feeling like a threat?
Can the focus coexist with the rest of your world?
If yes, intensity itself may not be the problem.
If no, another layer may be present.
A person can be autistic and limerent.
They can have ADHD and become limerent.
They can have OCD and become limerent.
Neurodivergence does not protect anyone from complicated attachment.
But we should never use limerence as a convenient label for neurodivergent intensity simply because neurotypical observers find that intensity unusual.
What about ADHD and hyperfocus?
ADHD is another topic that attracts confident explanations online.
You may have seen claims like:
“People with ADHD are more prone to limerence because of dopamine.”
or:
“Limerence is basically ADHD hyperfocus on a person.”
At the moment, direct research does not justify those statements.
ADHD can involve attention that is difficult to regulate, strong responses to novelty, and periods of intense focus. Those features make the proposed connection understandable.
Understandable is not the same thing as established.
A recent scoping review examining limerence and neighboring constructs identified the lack of direct peer-reviewed evidence connecting ADHD and limerence as a significant gap in the literature. 15
So if you have ADHD and recognize limerence in yourself, your ADHD may affect how the experience feels or how difficult it is to redirect attention.
But we should not tell a scientific story we do not yet have evidence to tell.
“Your ADHD brain is chasing dopamine from a person” sounds explanatory.
Right now, it is mostly a slogan.
This book can do better than slogans.
Grief can look obsessive without being limerence
There is one more important neighbor.
Grief.
After rejection or breakup, the mind often keeps returning to the lost person.
That makes sense.
Attachment does not disappear on the same day a relationship ends.
You may instinctively look for them in places they used to be.
You may replay the final conversation.
You may have imaginary arguments while showering.
You may check their social media even though you know it hurts.
You may wake from a dream and briefly forget the relationship is over.
None of this automatically means limerence.
Grief is the mind learning a terrible new reality.
Someone who existed in your daily predictions is no longer going to behave as expected.
Their name will not appear.
Their key will not turn in the door.
Their body will not be beside yours.
The future you rehearsed has been disrupted.
Of course the mind revisits it.
Where limerence may differ is in the continued organization around possibility.
Grief says:
I hate that this is over.
Limerent rumination may say:
But is it really over?
Again, people can experience both.
A breakup can activate limerence.
Limerence can become grief.
Grief can keep the fantasy alive.
Human psychology is full of overlapping processes.
That is why mechanism matters more than labels.
A better way to ask the question
By now, you may feel less certain about whether your experience “counts” as limerence than when the chapter started.
That is not a failure.
It may mean we are asking a better question.
Instead of:
What label proves what I am experiencing?
try:
What process keeps this experience going?
Consider several dimensions.
What is the central concern?
Are you trying to determine whether they reciprocate?
Whether your existing relationship is right?
Whether you will be abandoned?
Whether you can tolerate rejection?
Whether the person represents a future you desperately want?
What role does uncertainty play?
Does uncertainty simply annoy you?
Or does it keep the entire attachment mentally active?
What happens when you check?
Do you gain useful information?
Or do you experience a few minutes of relief followed by another question?
How much choice remains?
Can you redirect attention?
Can you tolerate not knowing?
Can you stop looking for signs?
Can you respect a boundary even when it hurts?
What is happening to the rest of your life?
Has the focus displaced sleep?
Work?
Parenting?
Friendship?
A partner?
Creativity?
Appetite?
Your ability to enjoy anything that does not involve the person?
These questions tell us more than whether you score enough points to earn a label.
They tell us where suffering is occurring.
And, just as importantly, where change may be possible.
The next chapter moves away from categories almost entirely.
Because once your mind has become occupied by another person, knowing what to call the experience does not explain what it is like to live inside it.
We need to go there next.