am helpless...

i love a boy for last 1 years he also loved me only for three four months our relation starts by phone and he is a very nice guy but i still love him now i have come to know he does not love me i tried to know the reason but he didn't told me,and i know that he is cheating me bt i lv him nd he is the beat of my heart i m trying to forget him but it is not possible for me,i m helpless, what should i do.................... i think he and his frndz are cheating me, am a girl of 20 yrs nd i have so many enemys in my college i think they played with me bt itz realy hearting me plz tell me wat i do????