Tips on getting me off during sex?

Boyfriend and I have been trying to be adventurous. But like most girls, I can only get off/cum with clit stimulation. Not sure if my boyfriend needs to try harder or I’m just “hard to please”, but any ideas of how to make me cum faster for those girls who can only cum via clit?

We’ve tried a vibrator (worked the first couple of times but then I think my body got bored of it lol)