Is she considered selfish, was I wrong?

My niece is dating this young man who loves her unconditionally..flaws and all.He has been a very big positive influence and motivation in her life. The both have decent jobs and the problem is she wants him to leave his job and move with her to a different city because she don't like the city/town they both live in. She says she is going to make him go with her.I suggested that she just find a new place just outside of town that way you can keep your job and he can keep his but she is adamant on moving and taking him with her. I wanted to tell her "you are going to loose him because u are trying to force him to do something and give up his job and all you are thinking about is yourself.The new location is an hour away.Neither one knows anyone there nor do they have any family or friends there. Basically she wants to just up and go because she is mad at the world. When I told her to stop running from her problems and face them,she got snappy at me.So now I'm going to let her learn it the hard way. I kept telling her to discuss it with her bf 1st but she won't...any advice /suggestions??