Do you think if he see's you sad and hurt that it may "rub off on him", I mean your sadness and hurt for him??
I think kids sometimes pull energy and strength from us as parents. When we are strong and confident I think they naturally draw that from us. Just a thought.
Don't worry mom, you are doing everything right, give him lots of hugs and I love you's, before you know it you will be nothing more than a taxi cab that has the ability to provide food and drinks to his friends when needed, oh then you become a yard stick to see how much taller they are getting, then you become the light of their lives (as far as boys go).
When he gets older, as mine are (17 & 19) I get unexpected gifts, flowers and text messages saying hey mom, what you doing?, I love you!!
All the love and support you give now will not be forgotten when he gets older!!!
nj