You can hang out here and read a lot. Keep posting. Many of us have been where you are and you will find much support here. Welcome!
It sounds like you have a pretty good handle on what you can and cannot do for him. Attending Al-anon is great decision. Face-to-face support will greatly help. If your BF wants to get help for his drinking, he will do that regardless of whether or not you are living together. Your job is to do what is best for yourself and your child.