What do you do when you can't be yourself?

For years I have tried to be something else, since I moved actually. I've tried to find a place for myself but failed. I'm happy right now, but my parents don't accept me. They say I spend too much time upstairs and I wear too much black. My mom has repeatedly insulted my style (which is akin to Harajuku style), she has made degrading comments about it and forbid me from wearing that or doing that to my hair. I feel like I'm chained up and can't express myself. She just doesn't seem to understand that I don't want to be just another girl in areopastle and skinny jeans. I don't kn