Take advice from a 30 year old married codger who never really traveled...
Either:
1) go with her and have a great time traveling and doing porn and getting a job in a cool new place and wind up bonding with her even more because of the shared excitement and adventure and because you were willing to travel with her.
-or-
2)cut her loose and stay behind. At 23 you don't want to be in a multi-year long distance relationship, believe me on that one. You will wind up resenting her. If she comes back and the spark is still there then you can pick it up where you left off.
