Fatal attraction

[Sarah]

Fatal attraction basically goes BEYOND normal attraction
for someone. It gets to the point where a person may
become morbidly infatuated with their love interest to the
point where it can get unhealthy and dangerous. If you find
yourself boiling rabbits..you may have a problem. See
Movie Fatal Attraction. If you have fantasies of making
that special someone YOURS (envisioning raping them)...you
have issues. If you have comtemplated on killing those who
will get in the way of your happiness and want to get rid
of the competition...that is FATAL ATTRACTION. If you are
stalking your prey when they rejected you...thats FATAL
ATTRACTION. AT this point...you are probally beyond help
and chances are...you will be slammed with a restraining
order..but of course that wont stop you because your
CRAZY IN LOVE..and just plain crazy.

[Sonia]

Someone who is obsessive and dangerous, especially, in pursuit of another for:

rejecting/spurning that someone.
treating that someone dirty.

It can also be expressed as a fatal attraction.

[Becky]

(eli has) intense feelings for someone