Swift, apart from being an amazing writer, you are the only steady sane person in the marriage.
Divorce is hard, and I'm not going to sugar-coat it, but time really does heal. You had no choice - just keep saying that to yourself because it's 100% true.
I've noticed that even in the short time you've been away from him, your sense of perspective and outrage has re-asserted itself. This wasn't possible while you were with him.