I've re-read the post on detachment and am trying to implement it!
I also re-read the post on the dance of the pursuer and the distancer. Right now it's a bit strange - I used to pursue emotionally but distance physically. He would pursue physically and distance emotionally.

He's initiating more conversations with me, bringing up happy times in the past and is acting flirty about 75% of the time and stand-offish the other 25%.

I noticed yesterday that I'm actually walking around the house now with good posture and my head up, instead of looking down and trying to make myself small and unnoticeable.

We were talking with the kids yesterday and I contradicted him on something small, realized it and let it go. I didn't keep pushing my point or ague it, because I would rather be happy than right. Afterwards, I approached him and apologized for it. (Neither things I would have done before)

We actually laid in bed and talked last night about random things like we used to instead of him just turning his back on me.

I know the possibility of him moving out is still there, but I'd like to hope that if/when he does, maybe we'll use that time to date each other and rekindle, instead of destroying what we have.