Will I quit hip hop dancing or not?

I dont know whether or not I should quit hip hop dancing or not. The reason I want to quit is because this girl thinks she's incredible and better than everyone else. But she knows everything about our dance teacher which us so freaky, she knows how many brothers and sisters and all that he has . It's s bit stallerish. I asked a few mates in dancing if I should quit or not and they said no because I am amazing. U also asked my dance teacher and he was technically begging me not to. But the only person who couldn't give a toss if I quit or not was the girl. So what will u do? And if I dont quit how can I deal with this girl? Ignoring her isn't an option. But if she says something about my dancing critically will I say something to my teacher? Thanks