Sex drive

I'm 14 and my boyfriend is 17. When we make out thing get so intense. Like he'll pull my hair, suck on my neck, bite my ear, and squeeze my thigh. Out of respect he won't touch me anywhere I would cover with a bathing suit...but I kinda want him too. I know we're both young, but it's a very committed relationship and please don't judge. He told me he doesn't want to take it past kissing until I'm 18, but when we make out he gets a boner and that turns me on even more. How do I tell him I want more?