What Is Person Addiction?

Consider a client who arrives in your office distracted, sleep-deprived, and struggling to concentrate at work. They describe intrusive thoughts they can’t control, mood swings tied to whether a particular person replies to their texts or not, and a growing sense that they’re losing their grip on themselves and maybe even reality. They may present as anxious, depressed, or in a troubled relationship. But at the heart of their distress, around which everything else seems to orbit, is a single person they can’t stop thinking about.

This is limerence. And our clients struggle with it more often than we realize.

Clinically, you might think of limerence as a mental state of profound, involuntary, obsessive romantic infatuation with another person (termed the “limerent object”). They seem to have some sort of extraordinary romantic potency. Being with them causes a surge of giddy euphoria that’s intoxicating at first but progresses from a natural high to an exhausting craving that makes it difficult to concentrate on everyday tasks. The desire for reciprocation rapidly becomes the main preoccupation of life, and that means rumination and reverie become a central part of the limerence experience. For many limerents, the emotional overload of the limerent object’s company can feel like a transcendent, quasi-spiritual experience. The symptoms of an advanced limerence episode could be described as “addiction to another person.”

Is It a Mental Illness?

The concept of limerence as “person addiction” has a lot of explanatory power. The neuroscience of behavioral addiction fits the progression of limerence neatly, and the parallels are just as striking when it comes to the way limerents act under the influence of a particularly feverish episode. Bluntly, they behave like addicts.

Instinctively, most limerents conceal the intensity of their feelings, sensing that they’re so potent that they’re not safe to share—especially if the limerent is not free to bond with the limerent object. Their intuition is that the truth would alarm others so much that it might jeopardize access to the limerent object. As one client described it, “A part of me must have been subconsciously afraid that if I spoke of my limerence experience to friends and family, someone would point out the inappropriateness of the attachment and tell me to move on. I wasn’t ready for a reality check.”

This instinct to conceal can mean becoming more deceptive in general: lying about intentions, minimizing inappropriate behavior, rationalizing poor choices, neglecting responsibilities, and prioritizing contact with the limerent object over everything else. The motivation to seek them can be so powerful that it crowds out other thoughts—it can be impossible to concentrate on daily tasks because of relentless intrusive thoughts. The obsession can get to the point where constantly seeking them diminishes life, but not seeking them causes unbearable emotional pain. The addict’s trap: heads you lose, tails you really lose.

And yet, for most people, limerence eventually ends. That sort of inbuilt recovery doesn’t generally happen with other addictions—which raises a question with real clinical implications: is limerence a disorder to be treated, or a trait to be managed?

Limerence and Differential Diagnosis

Limerence doesn’t appear in the DSM or ICD-11. It’s not recognized as a defined mental health disorder by most health authorities. But clinicians will naturally reach for familiar diagnostic categories when they first encounter it, and it’s worth knowing where those analogies hold and where they break down.

OCD. The overlap is real—intrusive thoughts, compulsive urges to seek contact, psychological distress. Some clinicians have proposed that limerence sits at the intersection of OCD and addiction, arguing that when romantic obsession becomes damaging it takes on an essentially negative cast: difficulty regulating mood, intrusive thoughts, and habitual, almost ritualistic behaviors like compulsively checking the limerent object’s social media or rehearsing future meetings.

But OCD is fundamentally driven by dysregulated anxiety and fear: the contamination that doesn’t feel clean, the door that never seems to get properly locked. Limerence begins with intoxicating joy that only later morphs into anxiety—and even then, the fear is of losing romantic bliss, not of personal vulnerability. The neurobiology is distinct.

Bipolar disorder. The wild mood swings of limerence can look like hypomania followed by crash. But the mood instability of bipolar disorder is generalized—it affects all of life and is triggered by a range of stressors. The highs and lows of limerence follow a highly predictable pattern anchored entirely to the limerent object’s behavior. When they reply or respond, everything is possible. When they don’t, the floor drops out.

Erotomania. Though rare, erotomania involves a delusional belief that someone of high status is secretly in love with the sufferer. Limerents can misread signals, but they don’t lose their grip on reality—erotomania is a different and much more serious clinical picture.

Anxious Attachment. Perhaps the most common clinical assumption is that limerence is simply anxious attachment in another guise—the obsessive thoughts, the craving for reciprocation, the fear of abandonment all seem to point toward attachment style. But the research doesn’t fully support this.

Studies find that people across all three major attachment styles report experiencing limerence with similar frequencies. Anxious attachment may worsen the symptoms—increasing preoccupation, exacerbating sensitivity to mixed messages—but it’s not a prerequisite. Secure attachers experience limerence too, and are often the most disoriented by it, precisely because it’s so out of character. One limerent described it like this: “I’d been a secure attacher my whole adult life and my first limerence episode shook my world because it was so out of the ordinary for me to feel that way, to not be able to accept a dead end and move on. Limerence overpowers even secure attachment.”

Attachment style biases the experience of limerence, but doesn’t cause it.

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Experiencing limerence isn’t a symptom of mental illness, a psychological wound, or an emotional failing. For most limerents it’s a normal part of the process of falling in love—albeit with a force that has a fierce and alarming power. Whether limerence overpowers psychological defenses and traps someone in a debilitating addiction is determined by emotional vulnerabilities, which depend in turn on history, personality, and life circumstances.

This is the frame I’d offer clinicians: limerence isn’t a diagnosis, but it is a common human experience that many of our clients struggle with. Knowing how to recognize it, and hold it with a client who has no language for what’s happening to them, is some of the most meaningful and supportive work we can do.

From Smitten: Romantic Obsession, the Neuroscience of Limerence, and How to Make Love Last by Tom Bellamy. Copyright © 2026 by the author and reprinted by permission of St. Martin’s Publishing Group.