Why the hell is happening with me..?

i met a girl in fb! we became very close good friends. where we share all our happiness, sadness, problems, and even our personal things! i have fallen in love with her and i proposed her. she told that she likes me a lot, she knows very well that i can keep any girl happy. but she cant love me..! i asked her the reason and she dont have any bloody reason for hating me or to reject me.. she said that she dint get any such feeling for me.. she likes me a lot as a gud friend.! i spoke to her as much ever i can, i cried a lot, i begged her a lot! but still she dint accept my love.!! whn i asked this much to her she said tht she nomore feeling like talking to me! i thought that a small seperation will make her to realize my importance to her.. so i told her tht i wont call, i wont msg, and i wont even come to fb..! its 14 days happened, we dint talk and no any contacts between me and her! i gettin mad here.. if i see my mobile, if i see my computer, if i see any lovers on the road, i eat any food tht she likes.. only she is coming to my mind..!! i have even written a song for her as she itself requested it.. i m jus singing it all time in my room.. i m dnt feel like talking to anyone! i feel like ending my life, but if i die, tht guiltyness itself will never keep her happy.. and still I believe one day she l definitely understand my love and come to me..! and the day before yesterday my friend spoke to her in fb. And tried to make her understand by telling my situation etc etc.. but she replied like “I sorry, I dnt wanna talk abt it”.. whn I feel so much for her wy dnt she feel for me… whn I miss her so much why she dnt miss me? She dnt get my memories at all ah? She wont even feel like talking to me huh..?? I dnt knw.. idk wht to do!! Wht will happen to my love.. wht should be my next step..? hw can I make her understand? I need her in my life.. as she is my life!!!! Pls help me thanks..! pls answer me!!!