I'm so glad he has the support he needs to get back on track. Recovery from alcoholism is a life-long maintenance program, and it sounds like he has a good program in place for dealing with relapses if and when they happen.
I realize that what I am about to say is going to sound like a criticism of you, but it's not. I know that you feel he should be turning to you for support and help with his alcoholism, but trust me....he shouldn't.
Family members, loved ones and friends are not the only choice for support and are usually not the best support. We are often too close to the situation--too enmeshed (I'm speaking from personal experience).
We, the supporters, support one another just as those who struggle with addiction support one another! I don't know what program your boyfriend is in, but most of them have another program specifically for the Friends and Family (AA/Alanon, etc.).
I'm glad you found us and hope that you will make yourself at home here!