Most Helpful Guy
It happens. People lose feelings for people they are dating all the time. Your cultures might have played in also. She could have wanted to be with you, and her family and friends could have been telling her that your relationship wasn't going to work, and that she needed to end things and be with someone who shares the same culture. That can be very depressing. As far as you know, this new guy could have been in the picture way before you two broke up. All you can do is move on like she has.