Good to see you back and still trying!
Your bf doesn't get it, and don't expect him to! That's a hug mistake we sometimes make. "Now that I want to get sober, you should completly understand me"... it just ain't so.
"Now that I've gone through the whole AA thing".. hello? It's only been a short time, he doesn't get that either.. non-program people, never quite get program people. It takes more than a couple of meetings on your part, you need a sponsor, and you need to start working the steps. Don't let him fool you into believeing otherwise. This is a life decison your making. You'll be at it as long as you want to remain clean/sober.
Very simply, one day at a time. Be patient, don't expect miracles over night to happen within your relationship, you've been granted one miracle so far, and that's your desire to quit.. go with that for now.. and please, please, stick to your guns on this, don't let him influence you, and listen to us when we say pot can be addictive. People in denial of their own use, never get it.
So go slow, try to keep some peace with him by allowing him to ask questions you can honestly answer, and he'll come around in supporting and understanding you better.