Is he afraid if sleeping with me cause I'm a virgin?

I'm 22 and a virgin, he's 25 and definetly not one. We've been toguether for months and the closest he has been to doing anything is putting his hands down my pants but never underneath my underwear. What should I do? Why am I always horny and he isn't? If he rejects making out with me one more time I will explode. I know I'm not particularly needy, but I'm ready and he doesn't seem to get it. What should I do? Is he afraid? Does he not want to?