How to lose weight fast?

i'm actually overweight for my age.i know this is nothing new but can anyone suggest an easy diet to follow to lose weight fast cuz i'm really fed up.all my friends are really pretty and look amazing all the time and it makes me feel a bit insecure and results in low self-confidence.i was never teased(i'm not obese!!just fat)but was always asked to shed those extra kilos!so what do u suggest?