I can relate to your situation a little bit....
while I dont think that Im being used as an ear (though I do love listening to people and trying to help as much as I can), I think understand the feeling that you cant talk to anybody about your own problems (I guess thats what you felt). if you do feel that you have no one you can realy talk to, then I suggest either forcing yourself to try and talk to somebody (friend, family, whatever).
also, if the urge to commit suicide rises, then I suggest one thought: do you realy think ending your life prematurely, while causing pain to close-ones, is worth losing the chance to ever feel any emotion ever again (and yes, sadness is included, and I try to be thankfull whenever I can to be able to experience it)?
also remember that runing away from you said more about that girl then about you, and that you can always find people who care and like to listen (E.G. the escapist, with a load of people leaving comments full of advise and sympathy etc...)
if you still feel like you have no one to talk to, im sure you can find hundreds, if not thousands of people here waiting to listen (myself included)