There is the possibility that she will wise up over time, but not likely. I grew up in a very strict Mormon home and dated only Mormon men until I met my now husband. He's a big boy and can make up his own mind. It takes him about 20 minutes to get ready.
If she is motivated enough to want to go on a mission, she will likely not settle for having a second class "eternal companion" you who is a convert or one who cannot be sealed to her for eternity. Honestly, you are probably the only person who she has ever known to outwardly label themselves an atheist. For every lesson and sermon preached about loving everyone, there are one or two lessons on avoiding outsiders because they will destroy your eternity. With that being said, I have long considered myself just a tad outside super TBM since we watched Game of Thrones, drank energy drinks, and occasionally stayed in my running clothes sans garments to do yard work. Secondly, if he's still in residency, he has to prevail and give it his all. I married a non-member over 20 years ago. I feel I am not appreciated and valued as a wife.
Why do we not talk about Heavenly Mother. The Church encourages you to use dating as an opportunity to show your respect not just for others, but for yourself. What this guy needs is support and understanding Maybe you didn't intend it this way, but it sounds like you're assuming I'm not already giving him the benefit of the doubt, space, support, and understanding. She will be pressured and will likely shut you out. I wanted to thank all the respondents and the blog author for sharing. It gives people a sense of purpose, while pressuring them to be 'good' by their book. There are many good things. I learned to read by reading the Book of Mormon.
Of course I feel slighted at times, but I check myself and remember that my SO is doing his best given all his demands. Although it may indeed be a good idea to get out of this one, we all need to keep in mind that the situation is more complex than that. If she is as real deal as you say she is, she believes this also.