Don't ask your husband if he notices your weight loss, he's blind right now. You just keep going for YOU and you'll feel good regardless of what he does.
And time to make new memories!!! I actually had the best summer ever during my divorce. After a couple months of depression I finally detached, made lots of friends and had some really fun times. Perhaps you can eventually find another mom to trade babysitting with...
By the way, I think you are a sweet, amazing person and just from your posts I can tell you are very beautiful exactly where it counts.
There is no arriving, ever. It is all a continual becoming.