Slept with an old friend what do I do!?
So I've known this guy since I was like ten years old. We were really close childhood friends always had crushes on each other but never acted on it. So when I was 15, I ended up moving, fell in love with my boyfriend, who I'm currently still with. We kind of lost contact over the years except for an occasional phone call, but we never ended up meeting due to me being in a relationship, and scared if we did meet I would end up liking him and I didn't want that because I loved my boyfriend.
But recently he popped into my head and I missed him so I ended up getting a hold of an old mutual friend who gave me his number. I called and he came over within 30 minutes after we hung up. I was expecting to just talk and catch up. By the way now I'm 21 and he's 23. We ended up buying some beer and got a little buzz going, then one thing lead to another, and we ended up having sex, but the complicated part is that we're both in relationships that were happy in. The next day we talked about everything and it seems like he wants this to be an ongoing thing just between the two of us. He said he won't get in the way of me and my boyfriend and this should be mutual when it comes to his girlfriend. He told me how he respects me and doesn't think of me any different and wants our friendship to stay the same.
I feel very guilty because I do love my boyfriend. But I also had fun with this guy and don't know if I should see him again or cut it off right here. I still can't believe this happened especially because he was always like a brother to me. I got a good morning text from him today and I'm just so confused! Please Any suggestions or advice?