Have you read How to Improve Your Marriage Without Talking About It? This is one of the best books I've read on communication.
I also liked the The Dance of Connection.
How is your MC helping you with this?
You can't change your H but you can change you and your responses. Have you tried that? When the conversation starts to go off track say something like "Lets stop now and come back to this at another time"
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss