When doing a 180, how do you deal with the awkwardness?

I wouldn't mind some input from FWS on this too. Right now, I am attempting the 180 (some days I am more spineless than others) while living in the same space as WS. I know he has noticed the distance I have put between us because there are awkward pauses when he says good-bye in the morning (I used to send him off with a kiss) or good night and I head off to my own room (again, there used to be a kiss and a wish for a good night's sleep. Now, I just wish him good night otherwise he comes in and asks if I'm mad about somethign specific or is it "just the usual")

Because we share the same space and have few friends, and none near by, we hang out together, but just as buddies. We chat about work and what to do later that day/week, but not much else. There is a lot of awkwardness going on and I amnot usre how to deal with it. Do I just ignore it (which I have been) or shoudl I address it. Also, does my keeping silent about what I am doing give him permission to think the marriage is over and his A with OW is okay? And how do I work this in a way to help us build back our R, which is what WS wants to do (and he is using the OW sort of a back-up in case our R doesn't work out, which means he has a safety net and doesn'thave to work as hard, I know, but is better than nothing).

Or am I just fooling myself? You all must be sick and tired of my flip flops, worse than a fish on dry land, between divorce and sticking it out. I know leaving him would be healthier, but, at the same time, I see aspects of him that remind me of why I married him. His attitude towards everything is improving daily with his new job (he gets respect and responsibilty now and he knows that they are his to lose). He has admitted that work may have worn him down to a point where an A seemed like a good choice and he only talks about divorce when we are int he middle of a fight and has told me to ask him when he is in a good mood how he feels (I'm too chicken but I understand. If you are in the middle of an all out, verbal fight and know there is someone sweet waiting for you, would you want to stay with the person you're fightin with?). I hold out hope that he will see the light.

But, then again, the light better shine clear before our deadline, because I can't take this see-saw of a life much longer.

Edited to add - waiting out awakward silences doesn't work in my case - WS is trained to be silent in hopes htat the other person starts talking in order to fill the silene (usual human reaction). We can literally sit next to each other, waiting for the other person to speak first, for an hour. It would probably wuite funny, or boring, to watch.
Chinook