I know what to do... What do you think I should do.

Its been 2 years now since me and the guy I loved broke up. We had to because he lives in another country (Germany) and I'm here (Florida) we still talked and made the most of the distance. We dated for 4 months before breaking up. A year went by and we started talking again. Yes I do still have feelings for him but he told me that he's seeing someone else now. It hurts me but there's nothing I can do. He told me he doesn't want to say goodbye to me and still wants to keep in contact. But he told me they slept together ... For me that just makes me want to say goodbye and never talk to him again. Not that I'm angry but just so that I can move on and not feel hurt that the man I still care about has moved on and I'm standing still.