My girlfriend cheated on me, she regrets now...what should I do?

miserabledude
I dated this girl for almost a year now, we would fight (she's flirty and I get jealous) but deep down we love each other and were planning a marriage after university. Everything was perfect until I return from my holidays. I got this feeling she is hiding something from me so I checked her computer and found messages to MY schoolmate. I confronted her and she told me she developed feelings for him when I was away and had slept at his place every night but they didn't have sex. She said she didn't tell me about it because she is afraid of losing me and said I am the one she really loved and they have already stopped contacting each other even though she still had some feelings for him. I was heartbroken but I gave her a chance anyway because I love her a lot.

However I can't get this "they must have had sex" feeling out of my mind. So I tricked her and told her I knew everything and to no surprise she admitted it. She said they were drunk and both felt very guilty afterward and that's why they decided not to see each other again. I told her we should break up and immediately she bursted into tears and begged me to take her back. I was determined and told her I don't love her anymore. She said it's okay but she wants me anyway because she knows one day I will love her back. After hours of begging she attempts suicide (I know this is hardcore), I don't know what to do so I said I will give it another shot.

Now she is treating me like gold and she promised to be honest with me because now she realizes how much she loves me and how much she wants to marry me. Problem is I am not getting over this (yet), she admits she still had feelings for the guy but she expects it to go in the near future. I also know she's flirty in nature (not a slut though). What should I do?
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+1 y
I understand the right thing to do is to move on but I love her a lot and I really thought she was the one. By the way I am sorry I didn't mean to post this under the sexuality category.
My girlfriend cheated on me, she regrets now...what should I do?
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