Since her father is a bishop, I'm sure he'll want to have his daughter marry a temple worthy person. We all know that. There will always be difference between spouses. 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. He isn't always around for holidays, birthdays, or anniversaries.
These garments will not be fun for dating, if you know what I mean. Like it was mentioned above, see how she deals some of the issues now and if she can't handle it, it might be better to find someone else. How will this all be once we have children?.