Confused about a great relationship.?

My gf left me while inwas deployed for a girl. I came hone and she still didn't want me. After the girl screwed her over we talked and ended up going out again. Bout 3 months in she said she still loved her and a part of her wanted to be with her. I told her why are u with ne then? She said cuz I'm wonderful. Yep wonderful. So now were on month 8 or 9 and things are going super good. But I still get mad at what she did to me. I have vented to her but she just cries so I keep it I side. It's not unbearable just hurts still. Idk why it took this girl hurting her to realize what she had with ne. All she says is she was t thinking. Im happy just still hurting. Is it gonna ever go away?