Thousands of teens ask themselves that very question everyday. There's thousands of answers. I can offer you some wieght loss advice, use the food bar of this website to help you decide what to eat, its helped me. As for excercise i recommend Tae-Bo w/ Billy Blanks, if rocks, everypart of your body will tone up and slim down, i think you can get it at any major video store, its a whole series, so you can't just jump to advance. You'r very tall, so maybe also your not as fat as you think you are, taller people weigh more, and are supposed to, but if your not happy with it, have the will to change it, good luck, im with you.