Most Helpful Guy
Most Helpful Girl
I would do your research first. I would find out if he was in a relationship because you want to respect the girl he is with as well. If he isn't in a relationship i would message him on facebook (most casual) and ask him how things are going and that you wanted to check in! if he doesn't respond then you have your answer. If he does than be cool and be his friend dont bring up anything relationship stuff or that you miss him. Let him do that eventually.