NO, relapse isn't necessarily part of recovery. It is part of recovery for those that haven't made that final commitment to recovery, or haven't had it made for them (like I did, dieing was a great motivator).
Now, hopefully you have fulfilled whatever obligation or need you had to help him and can get on with the business of helping yourself. Sounds like your AH has a ways to go yet.
So............................what are you going to do for you? Do you think now it will be easier to set boundaries and stick to them?
Now it's time to find some peace and serenity for YOU.
Keep venting, you know we understand. Keep letting us know how you are doing, you know we do care very much!
You will get through this, it just takes time.
Love and hugs,