My take on this is he is still running from him self, this isn't growth or learning from your mistakes, this is hiding from the hurts that you have caused to your spouse, thinking that if it involves a new person that you will not have the same problems, he is still angry, is he is a fog? who knows but he is still the same person that ran from his marriage, just the fact that he did not tell you out right that he is dating some one speaks for it self. He is still running.
Hope only you know what direction to take every thing that he related to you. I wish you well and I hurt for you. The pain that I hear from your word is telling me that you a beautful person, to be there for him and wait for him, even after all of this says what a glowing soul you have, and if he is not man enough to know this it will be his lost in years to come.