i had a serious crush on a guy and he never reiprocated my love for him and later blocked me on facebook when i tried contacting him on facebook and repeatedly sent him friend requests im still blocked although its been 3 years you cant really undo what u have done. the only thing u can do is to not cause any more trouble for urself and stop embarrasing yourself by seeking his attention u can do that. i have done that. i still miss him but now its much easier to live without him. may be you can start by sending him a short message in which u apologize for the inconvenience u have caused him and that u'll try to stay out of the way. and then just act upon it..not just say the words you can do this. anyone who has told u that u have got a whole life ahead of u,they are telling the truth u WILL meet more people and hopefully they will be Better people just hang in there dear!