I would keep my therapy up, calling 50 times and other actions are quite obsessive behavior patterns. Plus I would search out other meetings in your area, there are probably other groups around.
As for his stuff, I would pack it up, let him know where you are going to put it and if he doesn't get it within a week, toss it. Then go no contact.
The girlfried? Well, IMO it won't last either, he will be onto another, addicts don't have relationships, they take hostages.
Although, it does not seem that way today, he has done you a big favor. Take this time to work on you, read Codependent No More. by Melodie Beattie, the stickeys at the top of the forum and cynical one's blogs, lots of helpful information at your fingertips.
Keep posting, it will help.