<human>: Can you succinctly summarize the text in 1-3 sentences?

I've known this girl for a year and a half now. A year of that time we were dating. There was a point in the relationship where I left the country for two weeks so we had pretty much no contact. During that time she took a liking for her male best friend. She broke up with me and went out with him for a month, maybe a little less. And then came back to me and asked for forgiveness and all that jazz.

 After about 2 weeks, we started dating again. Everything was great. Obviously I didn't really want her talking to him but one day I saw that she was. I confronted her and she apologized and said she wouldn't do it anymore. Yet, it happened again about two days ago.

 The reason I ask if I should seek another chance is because, the main reason she broke up with me was because she's asked me to change a couple of times and I never really did. She wanted me to stop being so selfish, to be more mature and not joke about everything, she wanted me to treat her more like a gf than a regular friend, and she wanted me to be more affectionate. 

And the reason I brought up what happened with the guy was because the second time she was talking to him, I called her out on it and told her it's either me or him. She said she couldn't choose. The next day she tells me it's just not going to work between us because of how I am and how I haven't shown any effort to change for her. I feel like her and I aren't done yet, we have so much in common, the connection we have is incredible and she really can be a great girlfriend and all.
<bot>: She asked me to change, I always kind of brushed it off. As I didn't see what was wrong, since it's a habit now. Willing to show her I can change.