Try to live a healthy life and not worry about what people think. Women have body image issues. All women do. The prettiest girl you know has the same worries you do. Try to smile a lot and love life.
You are hot the way you are
Wait a few years before you start to worry. You're probably just starting to get your figure, it takes a few more years to stabilize.
there are many factors to consider like bone structure and organ weight int to pounds I suggest you test you body fat index it is a lot more related to overall health
how about you figure out how to get good grades and doing something really beneficial? just saying...
13yrs. 50 kilo would be healthy I guess
I'm not speaking German?.....