<human>: Give me the gist of the text in a nutshell

I'm a (m) 25 years old. my GF is 22. we broke up almost a moth ago and we are trying to get back. during that time she slept with a friend of her. they used to hang out a lot and I didn't mind because I'm not jealous. I asked her to stop talking to the guy because it makes me feel uncomfortable, but she said that she might do it if we get back together.
I don't know if I should demand her to cut all contact with this guy if we get back. I know is kind of hard because we have a lot of friends in common with the guy. I just don't want to deal with drama with this guy in case he decides to do anything stupid.

I have a really good relationship with "GF" and she was the one that told me about it. I got upset about but because we were not together I have to deal with it. in the past we broke up and I went out a couple of times with another girl, but I realized that I was in love with my ex girlfriend and we got back. she asked me to cut any contact with the girl and I did, because she wanted to feel a little bit more secure. now i understand how it feels and I want her to cut any contact with this guy.

we have been together for 5 years.
<bot>: I broke up with my girlfriend and she slept with another guy, now we are getting together and I want her to stop talking to this guy. we have a bunch of friends in common.