Rage meltdown ending on physical abuse adhd partner

Hello everybody, first excuse me for my english.

Here's my story and I am searching for help on how to approach my partner again.

He has adhd, add, emotional dysfunction, a lot of traumas and an alcohol problem. Probably there are other syntoms which weren't diagnosticate. He refuses medication and therapy, which he tried, and he tries by himself, many times he manages it. But when he drinks too much, he gets these anger outbursts that he cannot control. Normally he leaves to his place (he was everyday in my place). He says he has to go away to protect me, because he loves me, and he cannot control his rage. I never understood until last week. He could not go away, because his key was at my place, he was drinking the whole night and he ended up beating me up (bitting and pushing) and was arrested. After some hours he came out. Still in rage. I didn't see him, a friend gave him the things he had in my apt. And his dog. No contact 5 days.

I took care of myself.

I also have to say ( I am 54): this is the most loving, caring man I know. We spent all our free time together, doing nice things. I had a hard time with some issues and he was there. The most time we had a beautiful relation. He also tries very hard not to drink much, already made many changes in his life, he works hard and is in general an amazing person. He also did the homework, everything perfect. 

Now: I tried to call him yesterday. He has no family, no friends (only bar-friends) 

He didn't answer. I wrote him to call me back, that is nothing bad, no discussion but I need to tell him something. He answered "I should not". And that was it. 

I want to talk with him. To tell him I've learned a lot this days and many things he told me are clear to me now (I did not take ADHD so serious, never had to deal with it until January). I want to offer my help for him to make therapy. And I want to start again, because I love him, he loves (or loved) me and I believe we can manage to try in a different way. He asked me several times for help (like, please when I want to go to the bar, ssy no, tell me to come home) and I didn' t get it. 

What he did has no excuse. But I fund the explanation. 

My pain is so overwhelming and I know his pain about his condition must be terrible too.

In previous meltdowns, I was here to care for him. He cried and was like a child looking for safety. Now he is alone.

Question: what can I do that he talks with me at least on the phone? He is stonewalling and I cannot even tell him I forgive him...