is it bad that i just want 1 kid?

i grew up

practically alone , i never had close cousins, no older siblings (im the oldest ) , and i always been independent ,,so i told my fiancé that i just want 1, and maybe later on we can adopt 1 more . and he thinks i'm crazy and dumb because he grew up with A LOT of siblings ( 7) and a lot of family . so he says he wants like 5 from me but that's too much and i'll probably die with my sensitive body. 😕😔