It will definitely take patience to work through any of this with her but it sounds like she's a pretty awesome person. True Believer Mos base their actions on a set of priorities that make no sense to Nomos. Raising our children as believers is proving to be very tricky. I agree, girls, it can be a challenge to find time together. The goal of dating at that age is to broaden your social circle and learn more about yourself.
Usually, when Mormon girls marry non-Mormon men, these women forsake their religion and revert to ordinary American woman. Single women who are educated, regardless of religion, are also going to find similar gender imbalances among their educated peers nowadays. After his mission he lost faith on everything for some reasons. Or get them met elsewhere. I don't think you necessarily need to cut ties with her.