Husband wants kids and I don’t

Hey ladies, need some advice here.

The other day my husband was talking about his cousins child. He mentioned us having kids sometime soon. I told him I never wanted children and definitely do not want to have a kid. He got upset but I can’t just lie to him and say that I want a kid when I honestly don’t. He has brought it up multiple times.. He knew that I when we were getting married, we have never planned for a child. I have actually had 2 miscarriages so maybe my emotions are a bit messed up when I think of me being pregnant again. However, I feel that he wants children due to his age. He is 29 and I am 23. I just want to be open with him and tell him where my thoughts are at when it comes to us having children. Any thoughts on how I can sit him down and tell him my honest thoughts without it breaking into a fight? I want to be considerate of his feelings obviously but I mean he needs to think of where my mind is at as well.