Ex awkwardness...advice?

So I have a bit of a problem...
I had a long distance relationship which didn't work out, and I broke up with him about 3 months ago. Since it was long distance I had to break up with him over the phone, instead of face to face, which I didn't like but I felt I had no other choice.

After that we haven't kept in touch at all, until now. We are in the same city for the suivant few weeks and I keep seeing him because we have mutual friends. It's really awkward when we see each other and I'm wondering should I try to talk with him alone to get closure, ou just leave it and keep avoiding him? I have no feelings for him, but he was really upset when we first broke up and I'm not sure how he's doing now.

I don't want to encourage any left over feelings but I also don't wanna be a b!tch and hopefully we can be Friends ou acquaintances in the future? blah I've never been in this situation before