What do you do when you have a best friend that is like a sister and she is two faced
I have a best friend that is like a sister to me and she acts nice to me to my face and when she is with her other friends she says stuff that is untrue about me and my friends behind our backs and my best friends have done nothing but try to be nice to her and she just keeps insulting them and I try to make things better and talk things out with her but she just keeps talking about me and my friends and I don't know whether to just not be friends with her or break our friendship if anyone could give us some advice on how to fix this problem please respond and thank you for reading