Suggest Treatment For A Ligament Tear In Knee

Hello Sir , I'm a 15 year old guy . . I fractured my left leg's knee on december 11 , 2010 while playing soccer . . After having one and a half month plaster and a month of brace I'm still going through problems like clicks in my knee when i try to run or move i fall . . Doctors say that I got a ligament tear . . and that I would need a surgery . . I don't know anything about it . . but i don't want a surgery . . Isn't there anything I could do to get this right without getting a surgery . ??