you are skinny, and also you're worth more than just your weight and appearence!
A) your still gowing, B) everyone is different in not only body sixe but also metabolic rate C) the only person it should matter to is you. You should be happy in your own skin, if not there are a few things you can try to shed a few pounds but acording to your BMI your about perfect.
You're too skinny.
Yes you are actually skinny -.-' *_*
maybe you shoulld look at your height and build? some people find it harder to lose or gain weight due to metabolism or how fast your body burns energy
possibly it runs in your family or genetics
it could also be your body retaining weight to grow and develop
if youre only 13 or 14 you are still maturing and need the extra nutritients to prepare your body for full adulthood
lol you are skinny