well, any way you can. I think routine is best. Structure in your life.
when you say heavy drugs are you refering to like cocaine, heroine, or marijuana all are classified as schedule 1 by the USDEA yet some might consider marijuana to be a soft drug, but lots of water heklps new hobbies and new friends.
Find another hobby that you enjoy doing to keep your mind occupied when you are bored, and try to stay away from that crowd.
change your friends and hangouts pronto! Maybe you will experience a period of loneliness but you will grow as a result. Seek out a totally new group of friends and places to go. Best of luck to you! Be strong, girl!