Hey,
I am (detail removed by Moderator) months down the line from you, I have a house and life I didn’t before. I still feel guilty, but it gets less, I promise the good you will feel from leaving will our way the guilt.
I have my down moment where I miss him and I feel guilty but I now I’m free from him I can remind myself I’m better off, I think of the hurt he caused and the guilt feels less.
So if he won’t leave, you leave, you can be happy again! You can feel productive and achieve things.
Good luck!