As these are probably the two most important things to you, it will most likely, be a very difficult decisionвfollow your heart and the spirit.
Are you still working in interpreting or are you doing something totally different. That's in the footnotes of the polygamy in kirtland and nauvoo essay. Based on what you have written about your GF, my opinion is that you should cut your losses and move on. I'm married an interventional cardiologist; and I wish I only knew 5 years ago before she started her fellowship what the heck I was signing up for.