how do I get my husband to be more interested

I'm 5 months pregnant with my second child another boy. My husband is really excited to have another son but lately I feel like he's not that excited to hang out with me or talk or even have sex. With my first son he wanted to feel him move in my stomach and always cuddled my belly. He has not once touched my stomach to feel the baby this time around. When ever I talk about names or baby stuff he literally doesn't hear me at all. I always get the "did you say something?" I'm a little more emotional this time around so idk if that is it. If he's just afraid of making me upset over nothing. It's really starting to get to me. Especially since he's not lovey with me anymore either. Idk how to get him to be more lovey and be more interested in baby stuff. Help me!