I LOVE him DEEPLY! help?

theres this guy k it was love at first sight! and ive known him for 2 years. we used to be best friends now he doesnt even (seems like) knows i exist! now your gonna say "get over him there will be more" trust me i could probly get almost any guy i wanted. (except this one) i'v run out of ideas. ive tried being annoying to get his attion, ive changed my hair coulor so much i dont reven rember my natural hair coulor. i try to get to kow his friends so i will someday talk to him again. and he is so confuseing. he sometimes looks at me like he wants me to say something........then other times he looks at me like im some sorta alien bug that triend to distroy the universe. so much hatred so much despise. it hurts to see him look at me like that. what should i do? help me!!!!! p.s i dont want anyother boy!