Hmmm... it does seem odd that he would freak out about you talking to other people and then claim that you're the clingy one. I'm afraid that he's the only one who can tell you what he really wants. I don't know how to explain the mixed signals he seems to be sending you. You mentioned that he suffered from a few emotional/mental issues, is it possible that he's bi-polar or has some other mood-altering condition? (besides depression)