Flirty friend.

So I have this friend that always try to flirt with every guy that like me. I recently broke up with this guy and she already try to say that he is flirting with her. She told me that he stop her at work and that he make conversation with her for very long time, so wen I asked her what they talked about she didn't want to tell me. I catch her many times lying about guys hitting on her. She even said that one of my good friends asked her for her Snap and wen I asked my friend he said that it was her that asked him . I even catch her staring at my ex wen I was with him. What you all think.