My ex is lying about us...?

Me and my ex of a year and a half broke up about a month ago... She left me because I lied to her about seeing someone else before we got together and I never told her, and when I finally told her she left me! But a few weeks before we broke up I was having doubts so I asked for a break for a few days, she cried and called me every day because she couldn't do it which tells me she obviously really loves me. I've always treated her like a queen, I have never ever ever treated her badly, I've always been there and I've always stayed with her through her ****, but she's treated me like **** at times and as soon as I do something wrong she leaves!!

Anyway I made the obvious mistake and tried getting her back, but she said she doesn't want it anymore and wants to stay on her on with her friends?... So I've been no contact for around a week now, but then today I found out from our mutual friend that my ex has been saying to everyone there was other reasons we broke up, that I do loads wrong...? She's got what she wanted, we aren't together so why would she bother to tell everyone a bunch of crap that isn't true?