Thanks for the replies and advice everyone!
I realize in my mind I had thought he would be "cured" by the time we got to this one year point, but now I see there's still a long way to go and it's even never-ending.
I had a conversation with him today and it definitely seems like he doesn't have any intention of stopping at the moment. He seems depressed, struggling with how "his life is going to suck forever" trying to stay sober. I guess I just have to wait until he is at his low point again and wants to get help again. I have some thinking to do to decide how I want to deal with this and what my boundaries are.