I'm going through the same thing. Its been about 4 months for me. And I've only seen her twice. And I think you gotta cut the ties. If you see her it brings back the feelings. Both times I saw my ex I wanted her back and it set me back a couple weeks. Unfortuanltly I have to almost ask my friends if there gonna be hanging with her and if they are I'll make sure I'm not around for the most part. And while it does suck, if your in college like me it shouldn't be to hard to find some new people to hang with as I've been doing so far. Not to say you should ditch your old friends but in case there with her you got some other people to keep ya busy.