His relationship with her is newer, right? Of course there's a different kind of excitement there. Just because he says things to her that he doesn't say to you does not mean he doesn't love you deeply, and does not mean he doesn't respect you. Let him have his infatuation. If you met a new bf tomorrow, you'd likely be gushing, too, and saying things you don't say to hubby. Let it go... it's a different relationship, and be secure in what you have. Until you found that, were you feeling happy and satisfied? Well, go right now and make a list of ten things that make you happy about your relationship. I am sure it will be very easy to find those things you're grateful for.
The world opens up... when you do.
Oh, oh, can't you see? Love is the drug for me. ~Bryan Ferry
"Love is that condition in which another person's happiness is essential to your own." ~Robert Heinlein