Shes driving me crazy?

upon the first girl tht is making me severly depressed, theres another girl i really like... well i got used to reay liking her since i met her because I can't stop, weatherim single or dating shes always in the back of my head... the one problem... she has a bf... and they r madly in love... and all i honestley want is for her 2 b happy so i end up saving her relationship many times, i can also tell that they r not meant 2 b together and i seriously feel a strong cennection between us, i mean its ike we were meant 2 b 2gether cuz liik we started tlking wen a random chick i never even tlked 2 pointed me out on myspace, nd she added me, nd we were friends in no time nd now shes my best chick friend nd I'm one of her closer or maybe even her closest, guy friend and she has NO clue of me liiking her... so I'm pretty dam stuck here... because at this point she talks to me whenever she nd her bf r having probs and i always help her thru it... at times i contemplated going the other way and ending it, hen i would just feel horrible wen she cries... please help!