My gf (19) and I (22) broke up a few months ago. We both had issues and I said I wanted time to improve myself, we stayed friends in the mean time and things were pretty okay. Time has passed, we both have gotten better, we've both been in therapy. Everything was looking good for us to get back together. We were talking about it and she seemed receptive.

That was, until a few days ago, I found her Facebook account still logged into my computer. I wasn't trying to snoop, but while I was in there messages kept popping up of her talking to this other guy who I found out is 14 years older than her. He was clearly sexting her and coming onto her and she seemed like she was enjoying it. When she gets off the phone because she "has to go do something" I know she's calling that other guy. She takes extra long to call me back when she says she will.

I don't know what to do, I love her with all that I am. She supported me through some serious depression and anxiety, but now all that has come rushing back. I feel sick all the time, I don't want to leave my room, I don't know how to confront her without things falling apart between us.