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. Now we go out to eat or to watch a play or do something together about once every week or two, which is a nice change compared to once a year. Never ask vague questions and give her definite options instead. God roots for both our teamsвthe hopeful screw-ups and the straights. If you are dating a Mormon man or woman, be genuinely interested in their religion. Are you going to keep the sabbath holy as a family, or is he going to take the kids out for pizza after church, leaving you home to observe alone. If you can live with some auxiliary authority in your life knowing that your wife will, as necessary, bend to its will instead of yours, you'll cross those bridges as you come to them.
Also, I know a bunch of Mormons that say they are, but don't act like it. Because I have a husband that is not a member I have a quasi like status in the ward. I need suggestions to handld the neurotic behavior, ocd, and opinions. I've had friends with spouses that got Fulbrights or grants to study in other countries. Probably, not Mount Meadows level, but be prepared to have to apologize on her behalf a lot.
I learned that going out and having fun with friends every single weekend was not going to be part of our lifestyle together due to time restrictions, tiredness, etc. Hopefully they have some say in it, but I'm speaking about other churchgoers' expectations here, and probably your wife's. All parent-child relationships do. I feel as if my husband and I just live passed eachother. The important thing is that you are getting to know one another, not that you are always doing fancy things.
Tough to say what will impact your girl most - but there's your best LDS. I know a non-Mormon guy who married a Mormon woman and has kept her beautiful and desirable, by encouraging her religious involvement, even though he avoided Mormonism himself. If you are only after non-serious dates and spend a great time, you should be fine with this set up. I've seen it happen all the time. It takes the right personality and commitment on both sides. If they are, run to the altar, in or out of the temple. I have believed in for better for worse but I cant do it any longer. Anyone who's a decent human being should be able to know right from wrong and act accordingly.