Well having just moved out of the house from my estranged JW husband after 22 years of marriage I can relate to this. He "stopped" even being civil to me and when I was unhappy about anything he would always say "What did you expect? You left Jehovah!" And a person can only take so much of that. Its abuse. The condition of him being "happy" apparently was me having to eat shit and come back to the Kingdom Hall apparently. And even when I WAS an active JW we were NOT happy...so thats not even an option.
His happiness is NOT my responsibility. All that guilt crap is just so you will feel bad. I think they enjoy making us feel bad. I dont hear in your post that he misses YOU and wants YOU back and wants the RELATIONSHIP back...only that he wishes you would go back to the Borg??