Curiosity and Fear

So I have baby fever really bad again since having my little girl almost two years ago and I know a big part of it is because the people who raised me took my child away from me and I am really scared to tell my partner that I actually want to try to hace another baby... she wasn’t his biological child and he is actually a really good man who makes taking care of a kid a lot easier and who actually treated her better than her birth dad... he would be an amazing dad to any child if it was his biologically or not... any advice? PLEASE HELP!!!