I have a huge problem.?

So I have a huge crush on this 21 year old im 16 and i just like him so much and he likes me back but we are both very aware of the age difference and are careful of it. He would never pressure me. So please don't yell at me for that we have made out but that's it he's just so sweet and I feel like all the boys my age are So immature and they just play games. I sware i should have been born like five years earlier. What do i do?