I'm confused- what's going on here?

It could very well be that your friend is preparing for a case and if he is then this takes up a lot of his time and he has to get ready to go to court, so he needs his space right now. But Sara you also might want to give this some thought maybe you were just a good time girl, just there for the short haul. Sit back, relax, and don't get overly anxious, if he cares for you once he's finished with this case then he will get in contact with you. Give it a couple more weeks then you just move on, because he himself may have already moved on to greener pasture.