I Became the Doomed Friend of the Female Lead in an Obsessive Romance

A cool, detached heroine who only wants to go home X a lovesick hero who's an obsessive lunatic with no morals or reason

The hero's breakdown, in his own words:

"Am I the only one who feels insecure? Am I the only one who's fallen into madness? XXX, could you look at me just once? Love me, even a little."

The heroine: "Sorry, I can't."

Theme: None