Why is it his way or no way?

Megs

I love my husband and we have been married for 10 years. He is an amazing father to my 3 children from a previous relationship and the child we have together. Before we got married we had discussed having more children because he knew I always wanted 5 and he was ok with that. Right after we got married he changed his mind and told me he didn’t want anymore. We were not trying to get pregnant when we had our child together but he wasn’t upset or mad when he found out I was pregnant either but now he is flat out against having anymore and we take better precautions to not get pregnant again. Every time I try to open the discussion he flat out says no and refuses to discuss it. Everyone is telling me to let it go and just be ok with not having anymore and I have really tried. For the last 4 years I have tried but now I am getting more and more resentful, as my kids get older I get more upset because I probably will not have anymore. Why does he get the final say? Will I ever get passed this? Any advice?