Because you are growing and developing now, the best way is to exercise.

There is also a balanced diet, don't be picky about food, eat more fruits and vegetables, just eat according to the normal amount, don't go on a diet, it's bad for your health, and eat less greasy food. Doing more exercise is not only good for your health, but also helpful for losing weight.

I am, but he is much older than you. He just eats less and exercises more to lose weight.