how do you flirt with a guy who doesn't show interest with you?

Tweet

okay let's admit it. there will be guys who will show disinterest no matter how pretty you are. today i saw this guy whom i had a crush on for two months now and i want to get his attention but i dont know how will i start. he seem not to care even if we are already bumping with each other!!! i dont know what is it with him but i find it rather amusing. i do not also know if he is just shy to come and talk to me but i consider that idea because he is known to be an aloof person. but what if this happens again? what if i see him again or we are at one place?