Anyone dealing with negative significant other?

My boyfriend is not wanting this baby, and keeps making negative comments. I feel awful when he does this and I’m not sure how to react. I’m not quite 6 weeks, and as I’m buckling my 4 yr old in her car seat he says, “Six more years of car seats, good job.” It’s just always stuff like that. He said he won’t pray for a healthy baby or pregnancy because he didn’t want it. So I’m asking for those of you who believe in the power of prayer, to please pray not only that this baby and pregnancy are healthy and full term, but that he changes his heart.