Somebody at school whom I'm not really that keen on found my wizard rock channel. Now she's probably going to tell all the fashionable people about it and I'd really rather they didn't know. Advice?
I'm really horrible with advice. I'd say if you don't want her to tell anyone about it, ask her not to tell anyone about it. But if it were me at that age, I probably wouldn't have said anything because I avoided confrontation at all costs. If it were me at my current age, I'd own it and if anyone gives me a hard time about it, that's their issue, not mine.
One thing that I've learned in all of this is that I do something really awesome and nerdy with a lot of people who are really into the same things as me. I would love for everyone to experience loving something so weird in such a wholehearted way with a group of people so supportive as this fandom. Unfortunately, some people just think they're too cool to enjoy things this much. Just because they're missing out doesn't mean that you have to suffer for it.