Before I say anything, you should not be worrying about your weight at this age - we all change as we grow and we're going to put on and lose weight over time.
If you look around on Google for a calculator of your BMI or ideal weight for age/height, you'll realise that you're probably where you need to be right now.
However, being a teenager too, I understand why you may worry about your body, especially due to the amount of pressure we have thanks to the media - but I'm telling you not to worry! (Not that it will stop you!)
As I said your body is changing, so as long as you eat right and exercise well, you'll be fine.
Please don't worry that you may be fat - just learn to love your body and treat it right.
