Hi, I'm sorry you're going through so much pain. Your BF sounds like a sincere person who has put his recovery first. There's a possibility that his phone call to apologise to you was part of his doing the steps, and addressing his past behaviours.
I guess some people who are really serious about recovery can't handle a relationship at the same time. They have to give it 100%. But if he didn't take this seriously he would be no good to himself or you. If you read some of the threads in F&F of Alcoholics you'll see what it's like a few years down the path, and it's not pretty.
Have you considered Al-Anon where there will be others you understand what it's like to love an alcoholic?