All of the fat is not around your stomach, that's just what you perceive. You'll realize that when you start to lose fat and the last place that it comes off is your stomach. Case in point: you can't spot reduce fat. You have to just lose fat and basically, it will come off where it comes.
Read the nutrition 101 sticky and figure out your maintenace calories and eat less than that. A good starting point is 500 calorie or 10-20% deficit, but it will vary largely by individual. Also, you need to start exercising. Though I don't really see anything wrong with lifting weights at your age, provided you do it CORRECTLY, if you're not up to that or your parents don't want to or whatever personal reasons you have, just do something. Move around. Burn some calories. Do bodyweight exercises if you don't want to lift weights. Bottom line, FIX YOUR DIET.
Go do that reading and if you have questions, come back.
