is it right or wrong what my boyfriend is doing?

in the past i sent some nudes to a boy when i was younger. i'm older and a lot more mature now and i got myself a boyfriend who loves me sooo much and expresses that everyday. now, this boy i used to know literally fucked with my head and messed me up completely to the point where i have issues with sending my boyfriend nudes because it makes me uncomfortable. he knows what happened and he knows how i feel about nudes but he just can't help but ask for mine. i feel bad that this is holding me back but shouldn't he stop asking if he knows how i feel about it? (he's making me post this for opinions)