Ok, The title says she "might" have cheated. But its a little complicated... Some weeks ago, my girlfriend wanted to talk to me about something, and when I met her, she was in tears. She told me she needed a break, and I accepted it. When we cut off the break one week later, she told me she had a thing with a buddy of mine while me and her also had a thing in the start of our relationship. While I was prepared to hear that she cheated on me then weejend before the break, I forgave her for what she said she had done.
But later, one of my other friends told me that he had heard from the same buddy of mine she had a thing with, that he and her actually did have sex the weekend before the pause. Now, this guy has apologised, but I think that he thought that I knew about the sex, while I didn't and therefore I easily forgave him as well (for having a thing with her at the same time as me) while he thought that it was the sex I forgave him for because my girlfriend told him that she had told me everything. While I now suspect isn't the case...
So I need advice for what to do next.. it is to note that I currently work with my girlfriend in the military service, but I'm done and going home for good in two weeks while she has several months left here. And I also ask for advice for what I should do if she had sex with my friend. I love her, and we have reached the point where we officially call ourselves a couple. We have a good time together. But I'm afraid she kept it from me all this time...