If you can't do that, realizing that your partner may never come around to your side of things, you are not ready to marry this person.
Best wishes in whatever you decide.
The Church encourages you to use dating as an opportunity to show your respect not just for others, but for yourself. Dress nicely, as the girl will appreciate the effort put into looking good for her, and encourage her to do the same.
We should all remember this is a human being, and she has a brain. Most of us were Mormons and one point, many of us were even TBMs.
She will insist on raising her children in the Mormon church. Meaning that unless you are willing to become Mormon And your savings account.
Sexuality is the enemy of romance, and romance is amazing.
The independent work is just as important as the work we do as a couple. Life is a journey and going through it with a true partner, and a mutual respect for curiosity, is so far greatly rewarding.