Gil,
Morning, I want you to know that your story is not new and very concerning. As you already know physical contact is never acceptable in any circumstance and regardless of his explanation for blacking out which in my extensive experience I know to be unrealistic. Anyway, your not going to be able to help him with his addiction because your too close to him. Absolutely 1000% he’s deep in a physical and mental addiction that needs professional help and his GP or local addiction ctr is his first step to get the help he needs. Please please don’t get yourself into a long term abusive situation because his behaviour will definitely not change and he is fully aware of what he has done to you but can’t control the addiction. Firstly, You need to stay safe ! But you need to insist on him getting help for his addiction and don’t take “no I’m not” because he is. If you fear telling him then do it in a public place or write him a letter.
I guarantee you he will never escape cocaine or alcohol on his own as it’s not possible. And do not EVER let him put his hands on you again!!!!!
If you live in the same house then find an alternative because it’s just a house. I’m sure he’s a nice person without the poison but first he needs to stop everything to become that person. I wish you the best of luck.