So basically I've been gaming a friend of mine (known her for two years). I did it well (I think). We hooked up a couple of weeks ago for the first time. I had some issues and told her I didn't think I could be in a relationship with her even though I liked her a lot. She liked me as well. I was flying home the next day and we then spoke everyday for the past two weeks via skype. I have been debating with myself what I want with her but it has been getting more romantically intense between us and we decided we would see what would happen when I got back.
Then on Wednesday she told me she was going to Italy for New Years Eve. I knew her ex boyfriend is Italian but I asked her who she was going with and she said just some friends to a house party at a friend of hers in Pisa. I then happened to be speaking to her flat mate (who I never speak to but thought I would wish her Happy New Year) and I asked how come she didn't go to Italy. She told me she couldn't bear the htought of spending it with my girl's ex. I was like, oh, huh, she forget to mention that part about her going to see him... So the flat mate was like but she told me she told you! and (apparently) I had said I was cool with it.
Why would she lie to me? Why would she lie to her best friend as well?
Most importantly, how do I act now and should I call her out on it?