Hi EriKa,
Ok...here is my spin...
First off...it is totally natural to have a measuring post...we all do...that person we expect great advice from, great insight with and the person who holds up the mirror to your success and will be your biggest chearleader no matter what...That is how I see your friend D. He is the person you were at your best with (even as friends) and the person who you expected to reckognize that you were there again. That is the friend that, like parents you want to hear accolades from, unabashed overtones and all and out pride. I would have been the same way...I bet he was at some level your sounding board when you felt not the best about yourself and the person who let you know your worth always.
I have a few thoughts on why his reaction was subdued...
#1 he actually likes you as more - regardless of lip service...he is getting older and self-reflection is bound to happen - and now...sees you at your best again...your pride will affect your bubbly personality...and he at some level feels like he was left out...missed out...and now...no turning back...
#2 He is afraid of his feelings about how you look and did not know how to handle them...so avoiding is better than dealing with...
#3 He was totally preoocupied with something and will notice later...(I am not betting my money on that one)
When I met Dan..he acted indifferent...now I know that his reaction was a total fake and he was so afraid of his feelings..
He did not know the status of my marriage...and regardless of the fact his mariage was over...he was not sure where I was and thus...acted like I was a simple friend....
Later...after he told me how he felt...I was totally shocked...I pointed out his actions and our strict friendship beginnings, that I did not see any signs of more..and how did he expect me to read through them...he said..."What did you expect me to do?" To that I had to admit...I was not sure.
I think your friend is jealous...seems the Jonses is a big thing there...so acknowleding your feelings means that she would have to admit D should have noticed...which means she should notice..you have changed....You are a great catch...have a great marriage..3 beautiful kids...and the eye of many men in your area I am sure...sexy comes from within...D saw that in you always...now the perfectionists with views of body perfection have nothing left to cut you down with...to lower your value in order to raise theirs.
If he is that special friend to you...give it another week...than call him out on it....but be prepared for an answer that may shock you...have some thoughts on what his reaction might be and how you are ready to deal with it. What if he says he has always hidden behind humour and really wants you? Stranger things have happened.