You are both young and your marriage is young--you're right, everything is so green. So what I say about a WAS applies, but to a point. REAL GIVING is important, but so is taking care of yourself and your baby.
So what does this mean for you? Listen to the things he's saying and find ways (without many words--because that will be nagging to him) to remind him of the best parts of himself. How do you do that? Try to do things together that recall the best of times. Be creative.
But--maintain yourself. Do things that nourish who YOU are and make YOU feel attractive. Take care of yourself--body, soul, mind, spirit...and your child. The more you laugh and make yourself happy, the more attractive you will be and he will be more interested in the things that you coach and encourage (paragraph above).
Coyote gave you good advice about words--find other ways as well.