“While it only takes one spouse to be friendly, it takes both spouses to be friends. When both spouses are unfriendly, the marriage is marked by conflict and coldness. When one spouse is friendly and the other is unfriendly, the marriage is marked by selfishness and sadness. But when both spouses each make a deep, heartfelt covenant with God to continually seek to become a better friend, increasing love and laughter mark the marriage.”