Horrible friend, or just an insecure slut ?

so there's this chick I know & was good friends with. let's call her Zoe. than all of a sudden she hated me one day coz I talked to a guy on facebook. she apparantly liked him but I had no idea she knew him. I have never even met the guy in person before. but she bitched at me saying I had sex with him. now we aren't friends anymore & never will be again because of this whole issue. I even explained to her that I wouldn't do that. (this was about a year ago) now she did the same thing to another one of my friends. I personally thought it was funny coz I predicted that would happen. what's yer opinion on Zoe ?