So I really like this guy but hes older than me.

I really like this guy but he's a senior and im a sophmore - what do I do?

Do you even know him as a friend? If you don't, the truth hurts: you probably don't have a chance. Try going after someone your own age.
(If you actually are friends, then try hinting at how you are willing to be more than friends...)

yes, we're friends. He sits next to me in one of my classes and we talk a lot

people do that all the time he is only two grades higher than you. so go for it!