Like what you like, and be yourself. If other people like you, and yet you don't like yourself, what kind of life is that? Sure people may get at you now, but once you're out of school, how can they ever hurt you again? And what kind of example is it anyway, the other fans who are yet to be found out by the bullies, if they see you getting pushed around they might not want to be fans anymore, and then we'll lose fans. We have to stand strong and be ourselves. If people look at you weird just smile at them and shrug, even maybe say, "Yeah, I'm weird. " I've done that. I might not have any actual friends in RL, but people at work accept me as I am. And if, like when I waited in line for ROTS for 8+ hours (in the rain!) and the people at work were surprised at me, I just told them, "Oh, it was lots of fun."
As for parent problems, live with it. You'll be 18 soon enough. I had to live with it. My mom isn't against SW or scifi, but thought that I was too obessed with SW, that it was unhealthy, I should find other interests, I'm so boring now that all I like is one thing (I like several things, not just SW....), etc. I just put up with it, now I'm on my own, in my own house, and if I want to sit at my computer all day, I can. If I want to watch Star Wars all day I can. If I want to spend my paychecks on Star Wars stuff, what can she say about it. Maybe to make her happy do things with her sometimes, like watch her favorite movie with her sometimes, or just any other thing she likes to do. Then maybe she'll feel better when watching you get into SW a lot.
If it's something you enjoy, then stick with it. Later in life how often will you really see those kids from school? And if you do what kind of position would they be in to torment you? And maybe by then they'd grow up, especially if you ignore them while they're young. If you have to, maybe stop talking so loudly about it for a while, give them time to find other people to pick on.
Reality doesn't care if you believe in it.
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