OP, you would love where I live. This town is extremely liberal. In fact, we're one of the only places in California that weed is legal across the board, medical card or not, as long as it's for personal use. In high school, everyone did ecstasy and psychedelics as well as coke and pills. We didn't have "druggie" groups or anything, everyone from cheerleaders to shy, geeky kids were getting high together at wannabe raves and house parties on the weekends.
Having experienced that, whether my friends do drugs or not doesn't really cross my mind. But I'm not really into people who get fucked up anymore. I want friends who realize that at 20, it's time to be an adult. And ideally they bring something to the table other than a baggie of coke. Also, as we're getting older the people I went to school with are graduating to harder drugs to developing dependence on their current drugs. Not to say I haven't done the same, but it's no ones business but mine and I like to keep my affairs under control and private.. And sadly a lot of people who do drugs are unreliable, self-centered, and have issues. Not all! Just a lot of people in this town.
How did you end up getting into drugs? Who do you get your drugs from? I suggest going from there in order to find people to hang out with.