((((hugs)))))
This really is not your fault. You got sucked into the vortex of a really unpleasant character. In time, you might like to look into why you were vulnerable to that, but in the meantime, just look after yourself. I can relate a lot.
Do you have some friends that you can see this weekend? His opinion is not more important than that of other people, or of your own idea of yourself. He put you down to make himself seem better. That is not the action of a person in whom you should set your store.