Allow me to let you in on something. You want to know the reason you got off with a punishment as little as calling your parents? Its because you're 13.
Its because while they knew exactly what you did, your school administrators looked down at you sitting in your chair and said, "he is only a kid, he still has a chance to turn this around".
Here's some enlightenment. It isn't going to work that way forever. Just wait until you grow up. Just wait until you get punishment like the big boys. Because once the day comes that you get caught once again, and you will get caught again, the police won't just give you a slap on the wrist and send you to mommy and daddy. They will say "He had his chance the first time", put you in handcuffs, and slam your holding cell door shut.
After that, after the jail time, fines, and having your name stuck forever into the criminal database, everyone will know what you did. It will be forever put on record just what you do. Jobs will look up your record, see the criminal charge, and turn you away. Then everytime you get caught with drugs after that, the punishment just gets worse everytime.
Just something to think about.