Why is this girl not happy at all to see you when you come around when before you talked hugged and she called your name in class but you didnt tell who you liked when you mentioned it what to do?

Shes probably just upset that you didnt tell her that you liked her because if she likes you then what she wants to hear is for you to tell her you like her because if you dont tell her she might think you dont like her or you like sombody else and if she thinks that then shes of course gonna be upset.