I have a group of 8 friends at school and one of them is my best friend. Whenever she and I hang out by ourselves she acts like my best friend and we have a really good time. When we are at school or with our other friends she ignores me and will hardly even talk to me. I'm getting really annoyed with her because I don't understand why she is acting two different ways. I don't want to stop being friends with her because she is the best friend I've ever had and I'm moving at the end of this year anyway, so it is pointless to try and make new friends now when I'm moving in 3 months. What should I do?