my baby father doesn't want me to know the sex of the baby bc he wanna give me a gender reveal…

my baby father doesn't want me to know the sex of the baby bc he wanna give me a gender reveal party....but I wanted to know and do the gender reveal to the guest....I don't want everyone to know b4 I do. I don't think that's fair it cripples me from buying the kind of babies clothes I want....then he says fine then I won't do the party since I can't do it how I want...like hold on this baby shower isn't for u...