You are not fat! Some people are cruel or unkind because they are not happy with themselves. Please don't let them make you miserable.
You are very young & nicely tall already.
As you are still growing & will probably end up being about 1.75 tall which is brilliant height.My niece is about that height & she is gorgeous.
Some girls develop early some later and that is fine.
It is good habit to find sport that you enjoy & do that on regular basis. This will tone you up & you will feel better too as you will have more energy & you will feel happy inside.
Try eating some fish,lean meat stir fried with veg, steamed veg, nuts and fruit. Have 3 meals a day & 2 small snacks(piece of fruit or few nuts).
I got to 1.68 at 17 and I weigh 65 kg, I exercise & eat well & look really well as result.
Good Luck & Be happy & kind to yourself
No-one here knows that metric crapola.
everyone calls me a space cadet for living my life like an oddball.
But I don't listen to them.
I do what I want, when I want and I'm happy because of it.
I suggest you do the same.