Is there any casual touch between you? If you were to put a hand on his arm briefly while you are talking, or touch his back as you walk past him, how would he react? Might be time to find out.
I'm also curious if there are any changes he has made that are improvements over where your marriage was when it started to go bad.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16