I have not been through this, but may I share my thought anyway?
It depends on how lucky you get. Where you get a job, what kind of a job and how soon.
You might get a nice job with nice pay. You will do what you love and keep your relationship at same time. But, there is always "but". There is a chance you will not be able to land a job right away. You might have to go to another country? Bush-fly for few years...
Impossible to know. Do you want to play it safe, give up your dream and stay with that girl (well, there is no guarantee you will be together in 2-3 years from now neither).
Or you make take a chance. You risk money. You risk relationship... but you proceed your dream.
We live only once, so make a smart choice... the one that is right for you.
Me? I would say go for your dream... and if you gf is "right one", she will support you.
And last advise - dont get kids while doing CPL or before you settle a job... that most likely will be career killer for you then.
Good luck anyway!