Bullying problems / read?

Every since I was little, and I'm now thirteen by the way. Ever since I started school. Everybody hated me no reason why. To this day, and now I'm in seventh people just cut me down. It never really got to me ever, it's just I am a good friend, and nobody will even give me a chance, because I'm not perfect. In gym I'm not the athletic one, I'm the girl who does not know how to play. I never let my parents know, because I don't want them to get involved. I stand up for myself, but people end up laughing, and it makes me feel stupid. I love who I am its just being this young, and not fitting in it makes you feel worthless. I try my best for my parents, and they love me. Me and my mom argue a lot, my parents are stilll together. I live with my parents and my aunt. My aunt litteraly gets on my neves I love her, but she does not help. Please don't make front of me for this, because I always get picked on because of it, but I'm a huge Justin Bieber fan, because he makes me so happy, and just makes me feel like there is a reason to keep beliving in myself. Hes my idol, hes my everything, i love him more than anything ( of course not my family though ) when I get home from school I just watch his videos, and listen to his music, and it makes me feel so much better, and words can't describe how thankful I am to have him as a idol. He just helps me believe in myself, because he started off in low poverty, and he worked hard, nad he became something so big, and so great. I don't know what to do anymore with bullying. Justin is one of the only ways I can feel better about myself by the way. I know it might sounds cheesy, but most people who hate on him. Really don't know how much he means to me and so many more pople. Well enought about Justin aha, but I don't know what to say to these people who try to make me feel low about who I am. Don't say go to a adult, because I won't! I handle things by myself. Oh & I;m not sucidal. anyways tips?