Besides the advise from emily4040, I have a suggestion;
work at selecting the people you want to interact based on the outcome you want for your life!!
Get closer to what ever church makes you comfortable, Nerds are always a good choice ( and I mean it respectfully), people that are not in the environment where you'll find meth.
You can party a lot and have fun safely if you suround yourself with the people that don't consume it or relate to people that do.
Just food for thought.