Good on you for making a change now! In the teenage years the focus is so heavily on appearance etc so I can understand you wanting to use that as a motivator, and if that workd for you then that's great!! Just bear in mind that just because boys might say "cor, she's a bit of alright", doesn't mean they are necessarily nice boys to be with. Also bear in mind the health benefits as well as the cosmetic ones because they are the ones you are going to look back at in your 30's 40's 50's and say, "gee I'm glad I lost weight back then because it has made me so much healthier now!!"
There are a couple of other members on here in their teenage years so you aren't all by yourself and some of us were your age not so very long ago (I'm 24) so we are all here to help and listen and give advice when asked etc.
35kg lost. (November 2005 - October 2006)
15kg gained again (as at October 2010).
Back to the drawing board - Let's do this thing!
"You can't change the winds, but you can change the sails"
"Reach out and take control of what lands in your lap"