So while I believe that, in fact, non-celestial families still can be together forever, I also think that there must be great merit to qualifying for the whole Enchiladaвwhich I perhaps cannot fully appreciate at this time.
A lot of people are religious. I wish you all well on your recovery from this particularly vile church.
Once she realizes you won't join and she can't get married in the temple, then I suspect everything will be over.
I say to you, decisions determine destiny.