Confused

So me and my hubby are currently trying but not trying, and he says that he doesn't feel ready to have kids but would step up if it did happen. But he never tries to prevent us from having kids and sometimes after sex he brags about how much he came in me. I'm getting such mixed signals idk how to take it. I understand being scared of having your first child and maybe that's what is getting him but idk I just wish he would have a straight answer sometimes. And he knows I want a child badly and his back n forth really upsets me sometimes and idk how to talk about it or go about it. Advice please!!