You have changed and become a better person. By yourself or with whoever you will be with, you will be more open and communicative and (whatever his blame to you is) to the person you will be with. Being happy and who he is happy with are his decisions. wish him well that he has found happiness.
I am blesssed in a sense that H never said he left because of me. "It (the A) just happened". OTOH, I have no handle on what I can change. His feelings are closed to me (and anyone else). That's a part that I am still not content with. Sometimes I feel like we are roommates/business partner with sex included.
