I started smoking when I was 11 or 12 yrs old. My parents caught me a few times. Eventually they left me alone, I guess I was 16 or so. Now that I am 33 I understand, why they were trying to stop me. When I was 22 I decided I would stop at 25, then 30 and so on....Stopping gets harder for every cigarette you smoke. Make your mind up and stick with it. Are your friends smoking? That may have something to do with keeping on. Once you have set habits, that is the hardest part. For instance, first thing when you get up that is the first thing you do, after you eat that is what you do, what a controlling thing it is. For all of us independent people out there, who would have thought a cigarette would control our every move? All I can say is I wished at 15 I had known all I know now. All I can say is STOP!
Exercise and health is the thing for the future, NOT smoking. Good luck and make up your mind!