Boom

I know this sounds wrong. I am 18F and I think I have a thing for my cousin, who is 23M. I know we have a big age gap and all, but I really like him. He's entirely my type: tall, curly hair, wears glasses, smart, good with kids and pets, and just great overall. I have been feeling like this for a few years now.

I think it's obvious to everyone that I like him, what do I do?