How do I (23f) break up with my bf (21m) over our different opinions on sex?

My boyfriend says that he absolutely needs sex in order to feel loved, and nothing else I do for him matters (which I think is BS). No matter what I do or how much I kiss and cuddle him, he’s said to me multiple times now that there’s no point in just kissing or cuddling unless sex is going to come after. I’ll be completely happy kissing him but the second he tries to move things further and I say no, his attitude completely changes and he barely wants to continue. He says he respects my boundaries and the fact that I don’t have to but uses his excuse that he only feels loved by having sex as a way to guilt me into it, which is the reason I don’t want to (i feel like I have to). There’s no compromise to this situation. Either I have sex to keep him happy, and I’m hurt, or I don’t have sex to keep myself happy, and he’s hurt.

This has been an argument point for years now in our relationship (almost 6 years now) and I’m tired of it and want to leave. I need advice on how to go about it. Last time I tried to have a conversation about it, he threatened to kill himself, so I need a gentle way of saying it I guess