Relationship advice? a little help please?

So, long story short I go to a small school, one class per grade. so ive liked this guy since 1st grade and i want to be more than friends with him since this will be our last year together before high school. We flirt all of the time but we both deny it. Its not like were shy either, we are probably the two most outgoing people, or class clowns. another thing he sorta knows that i like him but not really. I haven't seen him in two months since school got out and were going to kinds island soon if that helps..? maybe you could tell me something to say to him?