KC, you have to stop making excuses for him. It is NEVER okay (short of adultery or physical abuse) to pull the plug on a MR, and to start an A. NEVER. Even if you were the worst W in the history of MR, he took vows of "for better or for worse" and therefore his energy should have been in doing his part to work on MR. STOP BLAMING YOURSELF.
Good men do not leave their wives and start As. Sorry, I ain't buying that. We've been down that path before. Start moving on with your life, you cannot "fix" him.
Wanted to address this: As far as your wedding ring, why are you taking it off? You are still married. After you are no longer married then you can remove your ring.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018