People will start to accept what you're passionate about once you start surrounding yourself with the right kind of people. It took me a little over three years to find a group of people who really loved me and accepted me. I developed really, really, really close ties with the kids at my school who did the shows with me- especially the spring musical and the partner I worked with during the fall play. It wasn't an ideal crowd to be around- everyone was a sophomore or freshman because nobody in my grade except for maybe ten or twelve of us wanted to do the shows, and only 3 of us actually wanted to be on stage, the remainder were techies. Nobody wants to be the senior who only hangs out with underclassmen, ESPECIALLY freshmen, but I made it work. It came down to this: I could be accepted for who I was by a group of people my grade would look right past, or I could take my chances with some of the popular people in my grade and cover up who I really was. And yes, I did get embarrassed when a some popular kid from my grade would walk by and see me hanging out with a bunch of freshmen. But I was looking out for my best interest.
I wish I could tell you "oh, just ignore the mean people!", and I wish I could tell you to "just be yourself and open up to everyone and blah blah blah". Unfortunately, school is not that easy. And I'm sorry about it. If you feel tension between you and your friends because they don't understand your hobbies and what you enjoy, it might be time for a change of company. I'm sorry. There were close friends of mine, friends I grew up with, friends who were there for me during dark times, that I had to cut ties with because they became toxic people and would only bring me down.
Sometime, it's not as simple as "just be yourself". Sometimes just being yourself won't solve all of your problems. You have to "just be yourself" around positive, supportive people or else you'll never feel secure with who you are. Find the right group of people and everything else will fall into line. I always tried to be myself, but I never had the confidence to embrace myself without worrying about what others thought of me until the right group of people came around to show me how loved and special I really was.
All the best.