Well, considering that he's the kind of guy who will spray bullets into an aerobics class because WOMEN ARE ALL VAPID WHORES, is it too unlikely to think he might've given off a weird, creepy, desperate aura that kept people away?
I read his journal earlier, he didn't seem to really have guy friends OR girlfriends. And it was everyone's fault but his, of course.
http://georgesodini.com/20090804.htm