My girlfriend is far more religious than I am. I have simply explained to her that God and I have a different relationship (we do) and that I do talk with Him regularly (I do) and He and I have a mutual understanding (we do). I still love my girlfriend. I know she would be beyond happy if I went to church and studied The Bible more but at the same time I think she respects where I am.
Why can't people be more like that is beyond me. That said, she's not American. There was a study done recently with the new Pope and apparently the results were that the majority of Americans get their religious opinions not from their church but from their TV.