Does age really matter?

Hello guys! I'm 16 going to be 17 on Feb. 11th! My boyfriend just turned 20 on Dec. 17th. He graduated mid term 2015! And I finished in the middle of my junior year. I don't see anything wrong with our age difference. And neither do my parents. We've been together since he was 17... is this really a problem? I've seen a lot of post worrying about age differences and I wanted your opinion. Is there something gross about our relationship. Opinions?

*age of consent is 16 in my state*