YOUR prayers are just as efficacious as a priesthood holders are. Put your best foot forward; be soft-spoken, courteous, well-mannered, chivalrous, and respectful. All these are reasons to have some serious discussions.
I'm 22 and I have been dating a med student for 3 years. Is it just the expectation that the SOs of people in these fields are on the backburner. He would be leaving his career, something he has worked so hard for and his passion for his family. You need to repent and change.
She's too heavily invested in Mormonism for that. Too bad she couldn't handle the guilt and remorse. Medical school and residency is really intense, and I think it's pretty common for doctors to get married a little later in life than the average couple. If I catch you in the back seat trying to pick her locks, I'm going to send you back to mother in a card board box.
God works by small and simple means to bring about His great and eternal purposes. Over two years ago I started dating my current boyfriend. I don't think you necessarily need to cut ties with her. Some Mormons believe the Telestial Kingdom will be littered with spouses who refused to get baptized.