I'm really sorry you find yourself here. On the plus side, the people here are really incredible. They saved me.
I'm just trying to get my head round this: your H is blaming you for his lying and cheating? Your studying caused him to go chasing after another woman?
Man, one of the many good things about education is that once you've earned that bit of paper, it's yours for life. Nobody can take that away from you, however much they might try to devalue you.
I agree with everything that Juju has said. I'd also add: let him do all the hard work of sorting out the D. If he wants it, he can do the work. You don't have to be obstructive towards him, just say something super neutral like 'I've never stopped you from doing whatever it is you want in life', and leave it at that. Don't initiate any conversations about it, don't do any of the work towards it.
And use that time and energy that you have left over for yourself, and pursuing your own interests. Like Juju said, put yourself in a better place and make your life good without him.
