Divided between 2 guys and need to pick 1!

I like these 2 guys. 1 is a year older and 1 is a year younger. I am in classes with both of them and I get along with both of them the same. I get the feeling that the older one likes me back but I don't know. I also get the feeling that the younger one doesn't like me back in the same way that I like him but like I said I don't know. I really like the younger one but I am also keeping my options open. The older one came to a couple of my softball games even though I was injured. They both play baseball. The older one is really smart but doesn't really know it. He got a 30 on the ACT. The younger one is about average intelligence. I am at least 1 year if not 2 years ahead in all of my classes. I already know what I want to major in and I have a few colleges picked out already. I am 16 and a junior and I have never had a real boyfriend before and really nothing more than a crush. I have kissed multiple guys and stuff but that's about it and they were for dares. I am really stuck and not sure which guy to focus on more. What should I do?