Here's a story from the other side of the spectrum.
I met a girl when i was 16, and i wanted to forget about being sick. I turned into a party goer, smoked (both things legal, and not) and didn't care about anything. I never felt sick duing this time, the fact that I stopped all my meds made me feel that I was an average teenager. I grew fond of pot and realized after about six months, that spending all my hard earned money on drugs wasn't working out. Besides I wanted to work to get my life in order, because i knew my life was shorter than average. ( i am now realizing this after looking at things, but it was just life back then). I cut down a lot, but i didn't stop. My ex- g-friend and I were always the hit of the party, For the first time in my life, i was the cool guy to the "cool guys". then i wanted to stop the party life, and she said that she did too. from that point on it became a game of keeping points on eachothers screw ups. needless to say we broke up, and i had to find my own way. I realized I had a high tolereance and began drinking a lot. I had a few flings with party girls, and then started hanging out with an old friend from school. Her bf drank a lot, and after one night of drinking we began to make friends(because we were the only ones still awake). Her bf and I began drinking together everynight, a case of beer a piece (believe it or not). We started betting people that I (a 130lb. guy) could out drink anyone. I never lost I bet, but then I got an ulser (sp?). After that i stopped hanging out there, and started my own life. I got back into the things that are important to me. Now I am the person I have always been. I still drink, probably more than I should. But it is within reason, and just because i want a few drinks, not to win a bet. I guess where I was trying to go with this is that the teen years are controlled by hormones. they make us crazy lol. We don't have another 60 years to get our life together. I made mistakes, and learned. You are young so if you want to do something it's ok, but don't loose focus on your life. The hardest thing to realize is that we need to get our lifes together faster than anyone will let us. Your friends are just in a stage, and when your life is the legnth of ours(even if your optimistic)there isn't much time to waiste on certain stages. Be who you are. find out things you like, and go for anything of your interest. This is your life, you are painting your own picture. what do you want it to look like?
sorry probably a little venting on my part, and it'a a little long but hoefully you got something from it.
Ben