Questions: Break Up & Divorce

I have been dating my girlfriend for 8 months until we broke up about 3 weeks ago (another reason by her which i found out was a cover up for what she did) and our relationship has been fine until about 4 months ago, when she became friends with this one guy, which i didn’t like.

I told her on multiple occasions that his intentions weren’t good and that i heard from his friends that he wanted to hit on her. I of course told her this and she didn’t believe it, and told me that she knows how he acts and how he would never do such a thing. She also said that if i trust her and love her that i wouldn’t get worked up with this because she wouldn’t ever do anything as she is not interested in him.

She kept hanging out with him multiple hours a day even when i told her not to.

Fast forward to to a couple days ago, when we were already broken up, i was told by a friend of the guy that she cheated on me with that she cheated on me while i wasn’t in the country for the summer vacation, and while she was still dating me. After i confronted her she got defensive and didn’t admit at first, but when shown a picture of the hickeys that she gave to the guy, she admitted. She said that she broke up with me because she felt guilty but couldn’t tell me the truth. So we were together for about a month after she cheated.

She has been nagging me for the past days saying how she didn’t remember what happened as she drank too much, and that she has no interest in him and that she would do anything and stop seeing anyone if i gave her a second chance. She told me that she would prove me wrong and that she would change and she would never do such a thing again. I still love her and i don’t know if i should get back with her or give her some time to fix herself.