I dont know what to do any more can u help?

ok so i really really like this guy and i want him to like me soooooooo badly but i dont think he likes me at all he never spoke to me but i do see him look at me once in a while at lunch but other than that he dosent talk to me! i kno wat ur thinkin just ask him out but im terrified of rejection and i really do think he's gonna say no how do i cach his i? also the only reason how i get his attention is actin weird and crazy i dont want him to see me as the crazy girl i want him to know me as the cool girl wat should i do?