Good postions to try?

So my boyfriend and I recently started having sex and it’s getting kinda boring. We usually stick to missionary or me being on top. We have tried doggy MULTIPLE times, but it simply won’t work because my boyfriend is 6’5 and like a foot taller than me. He is on the average side as well... he’s like 5 inches when erect. It’s hard to find good positions that work because it won’t go in when we try doggy because of the height difference and his penis size. Any tips?