When your partner doesn’t want anymore babies…

Just writing more to see if anyone relates really or has any advice. We had our son in October and my partner is adamant he doesn’t want anymore children. He said it since I was pregnant and I agreed originally but now I’m desperate for another…. I don’t mean right now of course but he doesn’t want more ever and it’s really getting to me. Knowing this is it :(. Not worth ending a relationship over just to be clear, it’s just something to come to terms with