Can’t stop holding my breath

My boyfriend has said he wishes I’d stop holding back but I can’t get myself to do anything other than hold my breath when I’m about to orgasm. It’s embarrassing that he has to remind me to breathe during sex I feel like it makes it difficult for him to enjoy it when he’s worrying about me not breathing. I guess because I come from a somewhat conservative background I’ve never been loud during sex and have always just held my breath like even when i first started masturbating. Is there anything I can do to get better?