((((Katie))))) You definitely did the right thing. Sorry he is still stuck in the blame game...it helps deflect assuming responsibility and maintains the sense of denial. It helps me to separate the child I love from the active addiction. Yes the child is responsible for the consequences of choices, but the actions in active addiction aren't about lack of love; they are about the disease.
I know it is difficutl, but the boundaries you are setting will help you whether or not he chooses to help himself. Things change when we stop sheltering and making things easier. Hugs