*hugs*
Just remember that you did the right thing. He was stalling, hoping that you would back down. He probably thought that you would feel bad about yelling at him, put yourself through a guilt trip, and invite him home with open arms. This is all part of his game. Don't forget how manipulative addicts are.
Him living at home was obviously not working. And what should happen with something that doesn't work? You fix it! The only way to fix this was to do exactly what you did... and it sounds like you did it well. He earned every bit of what has happened to him.