Your post really affected me because I have been exactly where you are. I justified my bad behavior towards my H and blamed him for everything. And during one of his calm moments, he shared something very similar with me.
For me this was a moment that helped me begin healing. For the first time in years I was able to remember that he is my partner and that I had a responsibility in our relationship to handle things on my end. And my behavior had isolated him. It was very hurtful and painful to hear. But I apolgized for the way I had treated him, thanked him for sharing with me in a calm fashion, and asked him what I could do to begin mending things.
This might be a great time to begin reviewing some of the basic skills such as
Validation and
Don't Be Invalidating because now that you are able to have meaningful conversations with him, validating what he shares with you will be key to rebuilding what has been lost. Thank him everytime he shares calmly. Even if you just say something like "Thank you for sharing with me even though it was hard for me to hear. I want to take some time to look at my role in this. Can I think about this for a day or two and we can return to this conversation then?"
When he shared with you, how did you respond?