I just recently turned 13, but im about 115-118 lbs. People who are my height or slightly taller than me weigh less, but I'm not sure if I'm somewhat fat because I am athletic...
Darling, you are not fat at all but here is something for you to keep in mind- as you develop womanly curves, you will see the number go up. Don't be scared by that, if you have the body type to get curves it's necessary. I'm 25 and I would look like a child if I tried to get as small as I was at that age. My favorite weight is actually 15lbs heavier from when I was 13. Don't worry about this stuff :)
Girl! You are not overweight at all! Im 14, short, and 154! You keep doing your thing, cause you are perfect!