What would you do if you were me? One of my friends often tell a lie to me,and then pretend to be innocent,As if it was a misunderstanding. She had promised not to do that again,but she just don't keep her words.It really hurt me.Because i treat her as my best friend,and we grew up together. But She never change,she lied again and again.I can't stand it any longer.I think friends should be sincere to each other.I don't like cheating or being cheated. I can't just let it be,what should i do?