Want to get out of the misery...plz help....?

well i met dis girl almost 1.5 years ago she was very reservd type grl nd avoided talking to all the guys nd ws very strict bt i somehow i managed to be her friend nd finally a real close frnd after one year i proposed her nd she said dat she cnt say yes cz she dnt want to face the problems in future she nvr had any boyfrnd evr bt still she said yes in 2 days nd bcame my gf let me tell u abt her she is very pretty sweet bt very much devoted to her parents nd i m one of the best guys in the college all girls like me even some junior girls hav proposed me too indirectly bt i nvr gave a damn to any of them cz i only luved her nd she know it very well how other girls r trying fr me...bt now she is getting engaged ni two months nd i cnt marry her cz she can nt tell it to her parents cz i m still a student nt a well settled guy nd they want her to marry within few mnths ASAP bt i cant cz my big brother is still unmarried nd i've to make my carrier too....nd the prblm is v broke up bt o cant control my self of thinking abt her nd she is still my friend nd i cnt break our friendship....pls help