She's more trouble than pleasure it seems. I don't think she knows what she wants and I wouldn't be surprised if a few months down the road she decides again to go for someone else. Usually there's a reason our relationships don't work and they often end the same way if we try to rekindle them. You really haven't described any happy times with her, only the problems she has given you. If I were you I'd go my own way for now and focus on school/work/hobbies, the right girl will come along soon enough.