How to be a healthier teen?

For starters, stop comparing yourself to your super skinny friends!!!!!!!! That's not gonna help you! And I know that you said you feel lazy about running and stuff but that's one of the best ways to stay fit is excersize a little each day. Ooooh!! You could jump rope cause that makes you VERY fit. Also, dancing is a great and fun way to stay fit. And watch your diet too. Try to eat more veggies and less chips etc. I hope that I helped you and good luck staying fit :)