I recently remembered Boxing Helena. CONTENT WARNING. Note: I haven't seen it in years; I may get some details wrong.
It's about a surgeon (Julian Sands) who is obsessed with his beautiful neighbor (Sherilyn Fenn). He even manages to sleep with her, but that doesn't lead to a relationship. He's unhappy when she spurns his romantic gestures & ends up with someone the wealthy doctor regards as a dimwitted thug (Bill Paxton). Eventually he confronts her about sleeping around & not returning his love. She gets annoyed & walks away, he follows her, she runs--into traffic wh