How to tell this girl that we are not best friends

Ok well this girl named shaylyn is always up at my desk at school like whenever the teacher says its time to go to our next class and when im getting my books, like whenever I look up she is standing right there. And she fallows me everywhere. Whenever...

im talking to my other friends about like what im doing on vacation or what im doing over the weekend with my family shes like cool im going to come with you , oh my you should invite me. She gets so annoying. She is really immature. So please help me on telling her were not best friends. Please!

Damn I got like the same problem except we are the only 2 black girls in sum of my classes and I don't like the other people, so she was the only one I talked to. now she's super annoying. I think this happens when you spend too much time with eachother. This proably isn't the best approach to this prob;em, but what I did was keep wuiet and whenever she taked to me I always gave her short answers. She know now that she be getting on my nerves. So maby if you don't tak to her, and take a different way to class, she'll get the message that you don't wan to be around her. Or simply write her or tell her that I need some spaace for myself. Ya know let her down easy