Girl! Hey you! Girl!! Come here

I really like this guy, but he's 3 years older than me,( he's in 12th and i'm in 10th) and I have no idea how he feels about me. When I first "met" him, like 1 year ago, I was with my friends and one of them decided we should "stalk" this guy she thought it was cute and since we were bored we followed him (psycho much aha, we were at school by the way) and his friends. After like 2 minutes they disapeard and we kept on walking when we saw them chatting in one bench as we were passing by them they start yelling "Girl! Hey you! Girl!! Come here" but we kept going and ignored them because..... Well, because it was weird and they were older then us. Long story short, the next 3/4 months everytime i walked trought them they said "Hey" and "Good Morning" or started waving (if you haven't guessed it yet I was the girl they were calling, I only realised it like 2 months after but, anyways) and without even realizing i started to have feelings for the him (the GUY not one of his friends) and his friends called me "his girl" and one time I heard one girl from his class saying he had a crush on me, but I thought they were only making fun of me (part of me still thinks that) so I tried my best not to show him how he made me feel but it was hard because I always caught him staring at me and he smiled when I walked by (the all waving thing had already stoped by this point) but because I'm a very shy person and I'm not used to guys looking at me I.... I don't know, I guess I didn't really passed him the idea that I've a crush on him too. When the school year ended I didn't saw him for 3 months and it made me realize that I really like him, in a way that I've never liked a boy before, which I find very stupid because I don't even know him. When school started again this week and I saw him... The feeling was.... I can't even explain it. But it's kind of hard because I know he doesn't feel the same for me, I know I should be happy he finds me pretty or whatever but what's the point if nothing is ever going to happen between us? I don't know if this story makes any sense but what he makes me feel doesn't make any sense to me either. I don't even know if he knows that I like him....
If you wondering what happened between us this week, it was just a look here and there from him and his friends. Nothing much.
I'm sorry if there's any spelling mistakes, english is not my first language, and if this story isn't nothing special, it's special (and anoying and confused) to me.
I just wish I knew how he feels about me... if he even feels anything at all. This is my last year seing him, and I don't know if I should enjoy it or trying to forget him.