Hi ft and welcome to the new "normal" of your life. I stinks but there is no way to avoid this ride as our S's bought the ticket and we're just along for the ride!
My W lived at home for a year past B-day. In that year nothing helped her to see things differently. In fact, it may actually work to your advantage that he is so far away! While in MLC, they jusy can't see us for who we "really" are. All the yeras we were together, all the things we have shared over the last 20 years should have been enough to at least slow my W down but it didn't. The fact that she was hurting our D's (ages 13 and 18) didn't slow her down. It really isn't about US, it's about THEM and what is happening inside.
My W is like your H. I have seen her do the same as you said your H has don, just stop talking to people who are close over some small slight. She never had someone in her entire life "break up" with her. In fact she was "proud" that she was always the one to leave! Very sad now that I realize how this has effeted her.
Hang in there. You will get through this. Do the DB fot YOU. Learn to be the best person YOU can and things will get better. I will follow youe stich and get back to you but just know you are not alone!