Hi Hw
Please please please don’t feel guilty in any way for this. None of this is your choice.
Also, if you leave him and he spirals worse, that’s his problem not yours. He is a grown man and he must take responsibility for what he does.
Sorry, but he can’t have a cosy life at home and take drugs, despite your feelings. That’s called having your cake and eating it right?
I honestly feel for you, I’ve been in your shoes. If you can get him to leave do it, and don’t look back. Make sure you and your children are safe though as he may become volatile depending on when you try to get him to leave.
Sending massive hugs x