Girls what catches your attention to get your Ex Boyfriend back?

You broke with him and told him to leave you alone...what would he have to do for you to talk to him or rekindle emotions. Im in a situation right now and my girlfriend ended it because she was unsure of her feelings for her ex, and now they are together. in the end i started pushing her ons and she told me off. She still tries to get my atttention at school and always stares at me though. Please help? I tried the small talk and it only made her furious...because i know she still has feelings for me but doesnt wanna deal with them. Its been a week since i last talked to her and that was when she told me to **** off