What can i possibly do now?

I have been in a relationship with this woman for very close to 3 years now and we semi-broke up a few days ago but it seems a bit wrong.We argue every now and again but usually just shrug it off and all but this last fight just made everything terrible and she decided to trick me into breaking up with her by making me feel so horrible and that this relationship was truly going nowhere and then basically mocked me about it after for payback for making her cry before.This seems so wrong and twisted and I really don't know what I should do now.I feel like I should try to apologize or something to her. but then she seems so much more happy without me around and I feel so empty inside and miserable and just plain crushed.I still want her even besides this piety drama and the arguing because I felt like she was worth it but it just seems like she doesn't want or care about me at all now.