Me and my best friend are like sisters. Were both 16 and we've known each other for 2 years and were really close. But i have noticed that she has been acting two faced these past couple of months. For example, she would invite me to a sleepover and than she would tell me that it was cancelled. Than on facebook she would make her statues about having a sleepover with my other friend. I called her and confronted her and said her mom changed things around. She offered to drive me but it was too late. And whenever shes at the mall, she never invites me. She also uses me when she wants to talk about her boyfriend or wants me to go to the mall with her and her bf. What should i do? Plus, she's the only closest friend i have so i dont want her to be mad at me. Im seeing her on Thursday for a friends birthday party