Anamorophilia

Anamorophilia(an•am•oh•row•fee•Lee•uh) noun/lifestyle:

Being possessed of or developing an intimate physical or sexual attraction for somebody who is not attracted to you.

Anamorophiliac can be used to describe someone who possesses this particular lifestyle habit.

A: Dude, bro’s a simp! she doesn’t even like him.

B: I think the term you’re looking for is Anamorophiliac.

A: tf does that mean?
B:…
A:?
B: Bro’s a simp.