We broke up after a year and some change...we both moved on and I was doing OKAY but pretty heartbroken. She started dating someone else 2 weeks after, but then 2 weeks later (a month in all) we started talking again. She said she was going to dump him for me. And she did.
We "started over" and we were going to be exclusive on November 1. I had a date and she was going to a party on Halloween night with the same dude she dumped for me. We pretty much said we would be loyal. I asked her if she was going to do anything and she said "No ty, i'm loyal to you"
Well that night she was thinking about coming over to my house instead and we were gonna party together. Well she decided to go to the party after all, and she completely ignored all my texts and calls that night. She called me at noon the next day and I asked her what she did with him and she said "just kissed". She stuck to this story for 3 days until I finally got her to tell me. She got drunk and had sex with him (a night after doing it with me nonetheless). I ended it.
But she won't stop begging me to get back together with her, like non-stop. What is going on here? Why is she doing this, should I get back together with her?