One thing I have noticed is that when someone is in NRE, they tend to be more affectionate with others. So some of this could be part of your husbands behavior.
I think most people try to mute their NRE somewhat so they don't get annoying. Let him know that you are interested and ask him questions about how he feels about the relationship. If you like brutal honesty, let him know. I tend to be brutally honest myself, and my wife has learned to ask me to soften my responses to her questions.