At our house, we have two body types under the same roof. Half of us are high-metabolism, lean machines by nature. Overweight among teenagers is increasing. Examine your own motives. Clarify your own feelings about food and weight.
Size is temporary.
Self-image is more permanent. The focus should be vibrant health, not competition. Being a teen is tough anyway. Overeating can be a sign of anxiety. Have a facial together at home.