Hes intentionally keeping you on the line. He likes the fact that he can sleep with a younger womand and have his wife pining for him. It probably keeps his young woman in line too. She knows he can go back to you, so will be on good behavior.
Why you two ladies feel he is a prize is beyond me.
You spoke about your feelings and what did he do?? He twisted what you were saying, to say his actions were ok and you were just being negative. This way you can stay in that state of confusion. Its intentional, selfish, and lacks empathy. It is called gaslighting. Look it up.
You need to further yourself along on GAL. You need to be more indifferent. I would limit interaction unless its business like and pertaining to bills.
He doesnt care about you. He's just playing games.
Hugs. So sorry you are here. Most of these waywards are just narcissistic and trying to rationalize and getting them to empathize is like talking to a wall. Its a waste of your life