Should I go on a diet?

I am 16 and nearly wight 9 stone, I am a womens size 8, but my friends are only 8 stone and still in child size clothes, am I too fat??

omg I cant belive you asked that!!! im onli 13 and 11 stone nearly and a womens size 14 lol so no your nt fat tara x x x

9 stone is about 126 pounds, but how tall are you, are you small or medium framed, you can't compare what your friends wear to yourself, everyones body is different. If you give me these facts I can give you some idea.

I am roughly about 5 ft 3