tta said: my criticism of those behaviors led him to think i wanted him to be someone else, and that nothing he did was ever good enough. i understand why he would feel that way, but i can't understand why he feels this is beyond fixing.
Maybe he feels it is beyond fixing because he does not ever want to give up pot. Thus it is beyond fixing. If he chooses pot over children and M right now, he won't be the first. He may not be able to picture himself as a non-everyday smoker.
I've known these high level smokers myself. Their level of denial and commitment to the lifestyle is high, because they feel it is tied to their success. Good luck with this.