Falling for him

I'm only 13 I go to my highschool bball games with my friends and I just fell hard for this senior that plays we have Took pictures with eachother and everyone thinks we would be the cutest couple ever! We don't talk hardly at all and I want to tell him what I think about him but he's 18 and I'm 13 as soon as I start highschool he will be graduated I don't know what to do help!?