sorry you're going through this. that would really stink to spend holidays alone. it sounds like he's not including you in his life much at all other then when it's convienient to him. the drugs may have left, but it seems the one track, self-centered addict mindset still has hold. i agree with the choir on this one, focus on you (if for no other reason then your health!). if he isn't going to take you into consideration in his life, he isn't appreciating that you do that for him. so try to take some time to live the life you would live if he wasn't consuming your energy. the things you would like to do if life was a-okay. if he realizes that he can't just disregard your feelings and expect you to just go on as you have been, maybe it will gain you both in the end. words don't seem to reach him, but actions speak in a voice that's harder to tune out. just like he can tell you over and over again, what he thinks you want to hear, but until his actions back it up, it's just so much air and no real, palatable result for you.
wishing you some peace and calm!