<human>: Hello everyone, I am in a major relationship crisis with my girlfriend of 2 years. Around two months ago we had a pretty big fight, (sometimes we do), and my girlfriend broke up with me and told me she doesn't want to do anything with me. 2 days after not talking I was feeling miserable and week so I started writing some random girl on Facebook, nothing flirty or sexual, just normal talk like, name, education, hobbies extra's. I truly thought that my relationship with my girlfriend was over and that we wouldn't get back together, because she told me she doesn't want to. After those 3 days of not talking I wrote my girlfriend and we started talking again, and we were going to meet up for 3 days trip a week after that. In the same time that other girl was still writing me and asking about stuff in my life. I didn't answer so much because I was trying to give her the impression that I wasn't interesting. Now before I went away with my girlfriend I wrote the other girl an honest message that I am sorry but I am not interested in her. Now here comes the stupider part. When I went with my girlfriend to the trip I didn't tell her any of this because I thought it will only hurt her and it didn't mean anything to me and I didn't want anything but for us to be ok. Now after 2 months she found out about that while looking throw my old messages and she broke up with me.
Now my major issue is I honestly don't know if that deserved breaking up over, because she did the same thing almost exactly, she started talking with a guy once when we were broken up, but she told me about it later when we were ok, although she did hide some details about sending pictures and stuff like that. I don't know how to approach this problem, I did something stupid and all I want is for me and my girlfriend to be ok again because I love her and I want nothing but to be with her.

Can you summarize the given text in a few sentences?
<bot>: I talked to some other girl while we broke up and I hid it. my girlfriend found out and broke up with me.