She is considered "an old maid" by Mormon standards, so she may be willing to marry you--hoping you will convert someday --but she will constantly be reminded that your marriage is inferior to the "Eternal Families" of sealed Mormons, and she will fear dying and never seeing her loved ones again.
I'm a Mormon girl in love with an amazing non-Mormon man. You can and should share with her why you don't and never will believe in the Mormon church, and let her decide for herself, but be prepared to have that blow up in your face.
I had to lobby and cry alot so I could bring my dog up, I am not sure how that will go because dogs have hair, need to go out, and the house might get messed up.
I feel to say, if you hear this, Amy, in time, it will all come round right.