UPDATE: ABF has not left, and I felt bad about not much notice, so I gave him two weeks to figure out where to go. I also shared the information with a trusted cousin of his, with whom I'm also close, who has also overcome addiction. She has offered him a place to be, which relieves me very much.
He was sober last night, and he has the shakes today. I am carrying on 'business as usual' for my and my child's lives, reading and praying. I will still attend my Al-anon meeting tomorrow evening. Thank you.