Will this relationship last?

the relationship was over when she made the decision to take the job. She chose the job over you.

Or rather the relationship CHANGED.

You need to start talking to other women and at least flirting with them, so you can not be destroyed when she finally explains that she is breaking up with you. If you were married, then the relationship MIGHT last - but since you aren't married, it is effectively over.

Since they moved without discussing his relocating things don't look good. It is hard to say whether her mms influenced her but it is clear that her priority right now is her career.

Probably not. Long distance usually never works out.