SO not excited...

I am almost 24 weeks pregnant. This is our first baby and it was a happy suprize. In the beginning he was more excited than I was. I was scared and nervous and unsure of myself. As time went on I have been able to get more excited but my SO seems like he's not excited at all. He doesn't try to feel her move or touch my belly at all. He says he'll be more excited once he gets some of the projects done around the house but then he doesn't do anything to get anything done...has anyone ever experienced this? Did things ever change?