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.
So I'm wondering if things will ever change or if this is just one of the drawbacks of dating a doctor.
She may never join the join the church. It MAY be true that she will be miserable with him and make him miserable with her.
My wife expects me to understand her situation but whiles I am willing to understand, I wish she would make some effort to etch out some quality time for us when she is not stressed out and grumpy and irritable.