Stalker: The movie
The only reason she ended up with him again was because he stalked her, there at the mall, probably made her car stall just so he could give her a lift. He was a proximity infatuation which is the reason why she went back to him. And again he stalked her.
She should've never made contact with him or anything and focused on herself. In the end she should've gone back to Stanford and find herself instead of needing a man.