*shudder*
Ugh.
I read a book about ten years ago that said addicts have to create stories where their actions make sense and what your AXH did seems to fit right in there. He doesn't want to play the part of the abusive drunk husband who was ditched by you, he wants to play the part of the loving-but-sad husband who finally could just not stand living with an insane wife anymore and left, sadly. Because he really wanted to stay and help you with your mental illness, you know.
The important part is that X in front of his name. Praise HP for that.