"And the woman which hath an husband that believeth not, and if he be pleased to dwell with her, let her not leave him. For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy. But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace. For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?" I Corinthians 7:13-16
A topic was posted on the Latter Days Message Board asking for testimonies from individuals who had been married to an unbeliever. I wanted to share a testimony here that it may be a blessing to others.

We had separate bank accounts, separate bills whenever possible, thought of ourselves first, divided chores in half, etc. We were just two people sharing a house and a bed. We were not "one" and were often too selfish to think of the other person. Everything had to be divided in half because we had to maintain "fairness" by making sure one person was not investing more than the other; we knew nothing of sacrificing for each other. We really had separate lives.