And would he be acting so depressed if he found an OW?
Obviously you know you're mindreading, but you are also too focused on him grasping for any little clue. You are going to drive yourself crazy doing that, and having so much focus on him (even if it isn't pursuing in the way we think) will be sending him vibes that won't help you. You are looking for sustained patterns of behavior. You don't need to look so hard. Take your focus off him and put it back on you. You won't miss those pattern changes just because you aren't watching him so closely.
I know did this too. We all understand wanting to get out of limbo. You can any time you want, but that will require you making the choice to get off this ride and throw in the towel. It's not fun to be in limbo, and that is driving the WAS as well as us, to erratic behavior. Hence the need for sustained patterns of behavior rather than pouncing on little signs.
It was hard for me to get off my unrecognized focus on my W by scrutinizing her for signs. It took her bursting the hope bubble I started inflating for me to recognize that I had been unconsciously shifting my focus on to her way too much. And, it took a couple days to make the shirt. But it was liberating, and we all know it gives the R the best chance.
Good luck!
Me: 50 W:43 S6, S3 M: 12 yrs. T: 17 M is bad & Not happy Bomb Mar '14 S 5 Feb '15 D Bomb 13 Apr '15 (but "no hurry") DB Coach May '15 Wants proceed on D Aug '15 Starting 1-on-1 negotiations Sept '15