Need to have sex

I just don't get it ... All my husband has talked about since August/September is that he can't wait until we have another baby. So we started trying in September (bc I wanted a summer baby). Well, my friends, every time that I tell him "we have to have sex bc I'm ovulating!" It's like he's too tired.... Honestly I feel like he's avoiding me on those few days. I'm starting to feel like maybe I'm pressuring him but then that wouldn't make sense either bc he's the one who initiated the topic to begin with! Ughhh MEN. Any advice ladies?!