Why does my crush ignore me?

OMG. IT's sorta long, but I've been goin about this for a year now, and I can't take it much more. I have or HAD a crush. A very,very,very BIG crush. And imma tell you my grade=8th. this has been goin on from last year 7th. im sorta very mature for my age and everyone says so. this guy, he was everything to me. i actually WANTED to come to school everyday because of him. now, just seeing him hurts. here goes nothing. he's beautiful, funny, tall, kind etc. he talks to everyone and I ALSO mean my dorkalicious friends too. (haha cute word) me? im the tribe leader of my friends and im NOT bragging. but, i am gonna say im the prettiest in our clique, and tallest what i mean is i have enough outer beauty for his attention. k now, our personalities, are the stinkin SAME. everything we like, our taste in music clothes style homework feelings the way we think EVERYTHING. heres a really hard part-he found out. that i liked him. and i thought well ok, its gonna be alright. BUT NO. he IGNORES me, tries to avoid talking to me, and only talks to me when he needs the reminder of what we had for homework in homeroom over the weekend. we've had the same homeroom for 7th and 8th. in last year, we had cards where we could pick who we wanted to sit next to, and iwas in charge of collecting them. he was ignoring me at this time (and to this day!!) when i looked at his card, it had my name on it. MINES. that made me confused and when i went home i just sat down and cried. cause i was just so confused at the way he was treating me. a different time in PE now last year, we were on a run, and he and his 2 friends came up beside me and my friend while walking, and then one of his friends pointed his head toward my direction, and said, "you like HER!?!?" (its cause hes popular and im not total different leagues) and he jumped outta his pants and ran away from me and my friend and told that guy in a voice with heartbeats you could hear, "im gonna kill you" haha. and in the end we did sit next to each other, it was last december if i can recall. but he ignored the whole way. never talked to me. one time tho, iwas doing my work looking down at my paper and i randomly looked up and saw him staring intently at me. i was shocked and looked back down and dont know where he looked after that. (but dont think this all happened in december, it was like from october to like april.) this year, we arent around each other much, cause we're only in the same science and homeroom and we dont sit at the same tables either. anyways, thx so much if you actually read the whole thing....please help me out here!?!?! i will forever be GRATEFUL to you because he's been eating at me for the past year...