Obsessive love

Obsessive love is characterized by obsessive or compulsive attempts to possess or control an individual, especially triggered (or even intensified) by rejection. Obsessive love can also be distinguished from other forms of romantic love by its one-sidedness and repulsed approaches. Rejection is the "ultimate nightmare" to an obsessive lover, who can not let go when confronted with disinterest or the loss of a partner. Usually obsessive love leads to feelings of worthlessness, self-destructive behavior and social withdrawal, but in some cases an obsessive lover may monitor or stalk the object of their passion, or commit acts of violence.

Most obsessional stalkers who are not delusional had some type of a relationship with their victim (an ex-partner), and have personality disorders.