Cadet's right. Don't tell him you're giving him space. Don't say "you're the one who wanted to be separated." None of that. Be mysterious. Get out and GAL if you have to. Is there anywhere in your neighborhood you could go--coffee shop, gym, library, a class you've always wanted to try? I find it's best when I'm not in the same house with H.
Also, I know this is not something you want to hear, but don't read too much into him asking why you're not staying in the same room with him, etc. My H was still living here months after BD and if I retreated to the bedroom after the kids were in bed, he would come looking for me, asking me if I wanted to watch TV. Meanwhile, he still had no interest whatsoever in working on the marriage.
Me: 38 H: 43 Kids: 2,4 T10 M6 BD: 1/14 11/14: H moves out