Anyone's SO not that excited.

My SO has an 11 year old daughter and she's been a fairly good kid. But it has not been an easy road with her mom, he really had to fight her for custody and visitation. He's a great father and devots a lot of time to her when we have her. We were ttc for a year and were successful, I'm 13 weeks now. We are having a son but he's not all that excited. He told me he's not a baby person and hates crying, that really bothers me? Any thoughts on how I should feel.