More will be revealed.
No one knows what will happen tomorrow. Or in a few weeks. Or months. Or years.
Meanwhile take care of yourself.
Here and now is all we have.
Hand him to HP.
Hand your feelings to HP.
He is not your child, he is an adult like you, he is not helpless. In fact alkies are among the most resourceful people, from what I have read here/known.
You say you do not want to be treated like this. So, don't be.
In my case I have found everything comes from my abandonment issues thus I unconsciously looked for abandonment from family, friends and of course "partners".
There is a better way to live
may I recommend "The Language of Letting go" by Melody Beatty?
HUGS!