girlfriend wants this job but?

My gf and I have been in this relationship for a while now, things are very serious and we are taking a step further. She just got offered a job but she would work all night and it's the complete opposite of my job schedule. So we wouldn't see each other for 5 days. Only on the weekends. I calmly told her that I support her but I wouldnt like that at all cause we wouldn't see each other at all. She got mad at me and said fine I won't take it and she won't talk to me. What should I do? It kind of hurt me when she said she wanted this job. I truthfully think it wouldn't work. She's like my best friend and we cherish every moment we have together. Her pay wouldn't be significantly more than what she makes now.. I'm not forcing her to do anything I told her how I felt. What should I do?