What Do You Think About This Situation?

Kayla
My boyfriend and I mutually agreed we were ready to have another baby. I have a son and he has a daughter both from previous relationships. We would like to get pregnant in September of this year. 
We constantly talk about baby names and different ways to parent. There are constant references to the potential child but he told me he doesn't want to talk about actually conceiving the child. He doesnt want to discuss any detail. He claims it makes him anxious. Is something I should be concerned about?