This is a freak chick!?

I have to sit next to this new girl in band cl and when i first sat next to her I thought she dressed really horribly, my friend Nikki ,being the out going person she is, introduced herself and me to this girl who's name is also nikki. She was really stand offish like she didn't want to speak to us. So after about a week This nikki girl would not stop talking to me, even when I gave her hints she would not see that i thought she was a pshico and that i wanted her to leave me alone. the other day my bf shanice told me she was a Satan worshiper. Im a christian so this was totally outragous to me. I asked and she said Yeah i worshiop the devil. I hang outwith all the sista girls in that cl when i told them about this girl so they came up to her was about to cuss her out. they did and so we decied i should get a note from my mother saying that I would feel comfortable sitting somewhere else. But I don't like hurting people's feelings. wat should I do, she still won't leave me alone!