Big nipples insecurity

I am very insecure about my nipples, I know they’re normal and everyone is different but it’s hard for me to take off my bra in front of my boyfriend, he doesn’t pressure me or anything and I want to show him my full nude body but I’m just scared of the reaction he may get....... he doesn’t have small nipples and he often calls his nipples pepperoni nips and I don’t know what to do... im really comfortable with him but just nervous if that makes any type of sense