My ex got a job offer then started dating another guy in the same company we worked. We had recently broke up but to be spiteful she grabbed herself a younger student looking guy and paraded around as the new happy fling. This was her goodbye to me after 2 years together while. I was BP up until the last 5 months together. As fate would have it I got a job in the same country which is a small island. So I will definitely see again. On her last day we had a chat and I said I am going back to my own country, this was a lie. A part of me wants to pay her back for what she did. But I also realise this is stupid. Should I just move on and bump into her when I bump into her? Because she will want to meet up when she finds out. And if she does do I see her or not? What's the best way to move on.