Remember that he is not doing this to you-- he's just doing it. My experience with my aexh is that lying to avoid confrontations is like breathing to him and often he doesn't realize that he's telling a lie, as far as I can tell. Somewhere I read that to an addict, if it could have been the truth, then it might as well be the truth, and can be presented as the truth-- that's where those "how stupid do you think I am" type fibs come from. My mistake was that I took them waaaayyyy too personally.
His drinking and dishonesty were there before I met him and they're still with him now after we're divorced. They don't have anything to do with me.
Alcoholism is his battle to fight, and when I get on the battlefield, I get hurt. Therefore, best not to go there in the first place.