Just my opinion and "you know everyone has one (light hearted joke)" Seriousley though, I just don't think figuring him out or what ails him would help in fact sounds dangerouse. There's so many things that could be driving him. The only thing I see as far as getting him to go away at this point is change your number. Sorry not much help but please be careful in what ever you do. I will pray for you!
mlyn