Did you do anything to hinder your relationship?
Did you tell her you have feelings for her?
Most of the time when you go out with a girl and break up with her you will not be friends with her or hang out with her as much as you use to. I went out with one girl and broke up with her and I can't be around her without our relationship stuff coming back up. It was mostly because we had sex and it got really deep after that. So when I try to hang out with her I just want to do her or go out with her again and she wants nothing to do with me. So staying away from her will not make your friendship better because it will just make it worse. Talk to her and see if she wants you to come out to her about your feelings.