My Unbelieving Spouse
I recently saw the movie "A Case for Christ" about Lee and Leslie Strobel. I had read the book several times and it is one of my recommendations for couples who struggle when one is a Christian and the other does not believe. The book is great and I thought the movie was even better (I'm biased, I know). I won't spoil it but the Strobel's story takes them from atheistic intellectuals through various crises and intellectual objections to conversion.
What I appreciated most about the book after all these years was the depiction of the wife's (Leslie) genuine love and respect for her husband through changing times and adversity. Marriage is difficult when everything is going well, let alone when trials invade and threaten to destroy a good relationship.
If you could use some help navigating the difficulties of having one spouse who believes and another who doesn't, consider reading the book or watching the movie. Here's another help by John Piper: http://www.desiringgod.org/interviews/how-do-i-love-my-unbelieving-spouse