I am a non Mormon. All I can recommend, as a docs wife of nearly 30 years, is prayer or to book a few sessions with a psychologist. Sorry that you went through that. Honestly, he probably is giving you as much of his free time as he can,and can't give you any more.
Most couples who are married where one is a Mormon and the other isn't, usually stems from a situation where they both were married in the temple, then one of them lost their faith sometime after that. The divorce factor may allow some women to experience single-faith marriage at some point as some Mormon men marry multiple Mormon women over the course of their lifetimes, but the overall point stands: The only options for these women involve seeking a partner outside of the church, or a lifetime of celibacy. And I never found that "good Mormon girl". Are there things you've had to compromise on to mutually make it work. We have been married for a little over 3 years. Be specific every time you ask. He also has sacrificed a more easy lifestyle. If you are dating a Mormon man or woman, be genuinely interested in their religion.
She's most likely secretly playing out fantasies of converting you, marrying you in a Mormon temple, and having a very Mormon life, OP. Even without temple covenants marriage is a noble and worthy institution. Doctors don't have time for anything really they are overworkedand tired all the times.
Should we try to heed their counsel and marry in the Church. I remember one time I did just that with a group of friends and someone saying, "Oh you have it so rough. I have no control over my schedule I'm sure you all remember those daysand it kills me to know that he has moved thousands of kilometers away from our home town with me so that I can do this residency. The Church does not recognize homosexual marriage, and does not condone sexual activity outside of marriage. In areas with lots of single Mormons of dating and marriageable age, the Church has established singles wards. You and your fiancee might want to get in touch with one to work out the day-to-day issues of an interfaith marriage. This can be done.