What should I do ?

Okay, well me and my suppose best friend aren't friends for the past three months... I have heard that she want to give me a letter and fix things but I'm not sure what I should do because I put up with her for the longest time and the past three months ago I couldn't handle any of the things she was doing ... She was lying to her parents and doing things that are morally wrong... I have also heard that she been trying to find a way to make me forgive her ... Should I forgive her? I don't know what to do ... I need someones advice on this... Cause I don't want to make the wrong decision... If you have any advice I'll appreciate it ...

wait... who is she? msg me and I will let you know what to do