Agreed - the brother is still lost in addiction. He doesn't want to go out because it's all about him and being in the optimal situation to get hammered. I would avoid hanging out there and tell him if he wants time with your boyfriend he can have it, but on your boyfriend's terms. Like not around booze. Remember the brother is sick and can't see how he is endangering your boyfriend's sobriety. Your boyfriend can love his brother but doesn't have to do as he says or fear him. If the brother gets mad - let him have his tantrum and good riddance until he can behave like a grown up, which isn't likely while in active addiction. God bless ya'll...