My husband would never have left me, because he wouldn’t have wanted ever to be the person to do that. Its far easier for them to push and push and push you until you make the choice for them, then they can blame you for that too.
If I was you, i’d let him go and be someone elses problem. That may sound harsh, but if/when he sorts himself out you can make a decision. If he does not then you haven’t had to live through this anymore.
Him moving out is not your fault, all of this is his own doing, and there isnt anything you can say or do to make him sort himself out.
Move on and make new happiness x