Not knowing your BF, but having heard thousands of stories on these boards, my money is on this:
An attempt to manipulate me into picking him up because he either wants to prove that I haven't abandoned him or he wants to see me but can't bring himself to say it? Or does this mean "read between the lines, he's not done with drinking."?
What is it about his mom's house that is 'driving him to a bar' ? The fact that she won't let him drink? My guess is that he wants you to rescue him, and give him a soft place to land so he can start drinking again. But that's just me - having seen this so many times.
Protect yourself, and let him handle his own recovery. If he is going to get better, he needs to take responsibility for his life....not try to weasel his way out of it, make excuses, or get you to handle it for him. He has a safe place to stay, he has AA, he has a little sobriety.....there is little you can do to help at this point except pray. The rest is up to him and his higher power.
Good luck, jcfollower. Glad you're here with us!