Im a 13 almost 14 year old girl, I'm about 5'8. About how much should I weigh? All my friends call me skinnny but I think I'm sort of fat. ANy help is great!:)

I would say around 135 to 150
This is a BMI chart

What's the Right Weight for My Height? (http://www.kidshealth.org/teen/food_fitness/dieting/weight_height.html)