Those things haven't changed because of him. Focus on listening to the things you know about yourself. Make your list. Make it long. Write it down, work on it. Think of all the nice things you've done, all the beneficial, kind, decent, respectful things you've done, for yourself and others, things that are nothing to do with him, that you would have done even if you'd never met him. Think of the work you have done. Write them all down, think about them, spend time in your head with them, meditate on them.
I have a feeling that what's happened is that you've missed red flags he's shown you, because you're used to taking responsibility for bad things that have happened in the relationship. And this willingness to accept the negativity as your own is now all you're left with. It's not real, though. And it's not your fault. Perhaps you were raised minimising your own feelings?
You know that you don't have to believe in all your feelings? Sometimes you can just look at them and say 'Jeez, look at what they're doing now!' You still have to respond to them accordingly. You can't ignore them. But they're feelings, not facts. You know that, factually, you're a decent, kind, and very worthwhile person, right?