I agree with others, you really do need to focus on
yourself, something you have probably not done for years as you poured your energies into him, and his needs, him becoming sober. It sounds like
he was the hard work, not your marriage.
I'd take a step back and start to do a things for myself, develop my own life. And I'm glad you've got a therapist, too.
These things happen sometimes, and he might not be singing the same tune when he sees
you off to the opera while he's at an AA meeting.
Keep coming here for support and maybe access the Friends and Family forum here. People who understand.