Maybe a group home would be beneficial for you. If it's a good one they can help you stabilize and set boundaries so that both of you can get well. Two unhealthy people don't make one strong union instead they feed off of each other making them both weaker. You can not fix him, he need doctors and T to help him do that. Perhaps the temporary separation will give you both the nudge you need to heal.

You can only work on fixing you, get the help you need to do that first.