One of the most well known church prophets stated that he would rather see his own child dead in their coffin than married outside the temple. If she is as real deal as you say she is, she believes this also.
Once she realizes you won't join and she can't get married in the temple, then I suspect everything will be over.
So that's something I can't say is good or bad. For me and the woman I'm in love with, we CAN discuss it without breaking down into spittle and hate.
You can always expand these into group dates by inviting other couples along, which may make her more comfortable in the early stages of your relationship.
Anyway, before you marry you should work out anything hypothetical that might come up in the future.