didn't love her only liked her and wanted to fu¤ck her & used her as an escape from all his problems and feelings of unhappiness.
You are still very fresh and raw, and focusing on his feelings 'for' OW is natural. However, I would urge you to concentrate on his statement above. It reads very true to me, like he is trying to tell you the truth.
I worry that you are trying to see in your conversations what his feelings for you are - seeking 'affirmation' from him. Look deeper inside yourself for affirmation, it is there, you don't need it from him. Honestly, it is hard to remember that sometimes as a betrayed person, but you are disempowering yourself by focusing on a worry about how his feelings for 'it' (the affair) reflect on his feelings for you.
Turn it around in your head. Your H was so lacking in his own feelings of esteem and self-empowerment that his head was turned by the frisson of available pussy, and so yes, I do understand that she was but a ego-masturbation as well as a sexual masturbation tool - a self-medicating running away from himself. She could even have been a blow-up doll, such was her role in his escape. So used and abused are very much pertinent terms IMO. And she allowed herself to be used and abused, complicit in her own exploitation in return for a little attention. Two egos fucking. That's all.
Hold your head high. Your H did not look inside himself and recognise the needy hole at the time, he chose the easiest and quickest routes to temporarily alleviate feelings of depression or self-dislike, stress, or whatever. His coping mechanisms were poor, and it sounds like he does in fact recognise all that now.
The question now is having admitted he is/ was a 'user', what he is going to do about it? How is he going to gain back your respect and his own self-respect? What analysis is HE going to bring to the table, or apply to past behaviour in order to understand his future? If his self-esteem is so low, how is he going to find a way to develop a stronger sense of self, so that like for himself comes from within and does not need fanned by any available female?
Please do not make the mistake that his actions were a rejection of you - they were a rejection of himself, and his actions simply seeking surface solutions. I am sure in the fullness of time he will begin to despise himself having had to resort to being a 'player' to prop himself up.
It was not 'her' that he had feelings for, but 'it' - the frisson and fantasy of being someone's (anyone's) object of admiration and hero.
JMHO