Love failure - My boyfriend cheated me

Hi Friends,
We wrer in love for past 4 years. i cared him much. i use to fight with him oftern to get his time for me. He also love me but he never use to spend time and not that interested to chat etc. but some how i felt his love. for past 3 and half years we had physical contact also he forced me even in my sickness. Last year my parents found a nice aliance for me almost fixed that time he took his parents to my native pace and informed that we are in love. somehow my village people and relatives came to know. Before 4 months he went us by promissing me he will come back and marry me and every day he use to tell after marriage we will be like thia and that. before 1 month his attitude got changed. he changed his gtalk password and blocked me from his list and started to loving another girl there went from here. Everyday im begging him like anything to marry me but he is not ready to tell the reason and also informed his parent that he dont want me.

im totaly depressed and not able to concentrate on anything i quit my job. every day cryiny. not getting sleep. im scare whether i will go mad. I had physical contact with him it hurts mea lot. so i dont want to cheat anyother guy. Now im 30 years old. he has spoiled my future.

Please help me to come out of this hell.