Shar: Welcome to the forum.
This forum is to help you understand your feelings in the R/S so you can decided whether to stay or leave.
Your therapy and your H's diagnosis are already a step in the direction to give you facts on which to make choices.
The silent treatment you are being given is a form of emotional abuse. Make no mistake about this. Even though no punches were made, your brain/psyche can be
physically impacted by the silent treatment. The physical damage from emotional abuse is real.
The silent treatment is very passive-aggressive.
https://www.heysigmund.com/the-silent-treatment/Have you started a list of pros and cons about staying and leaving? This might help.