Traditional wedding vows: "I, (name), take you, (name), to be my [opt: lawfully wedded] (husband/wife), my constant friend, my faithful partner and my love from this day forward. In the presence of God, our family and friends, I offer you my solemn vow to be your faithful partner in sickness and in health, in good times and in bad, and in joy as well as in sorrow. I promise to love you unconditionally, to support you in your goals, to honor and respect you, to laugh with you and cry with you, and to cherish you for as long as we both shall live."
God created the sacrament of marriage to mirror God's desired union with us. God does not leave us when we are sick, weak, unhappy or poor. God does not forsake God's promises when we fail to keep ours. God is steadfast, and eternally loving. And God wants the same from us for each other. While the human condition makes that impossible one hundred percent of the time, there is no reason not to have that as a standard, for the higher you reach, the closer you will be if and when you fail. The standards and expectations for marriage are, of course, daunting and difficult, but they are supposed to be that way - marriage is hard, and the difficulty of it should not be taken as any indication that something is "wrong," and it is no excuse to break one's vows. Marriage is difficult between any two human beings, and that is a sign that it is worth it.
Divorce is not the "solution" to "falling out of love" with a spouse. When wedding vows are made, they are promises to love the other more every day, NOT "feel like loving the other more every day." Feelings come and go, marriage is for life...
For as long as you BOTH shall live. Not to be overly critical, but I have a rather difficult time seeing where the traditional wedding vows leave room for second marriages no matter what the circumstance. The Bible may (depending on interpretation) leave room for divorce (Matthew 5:32 - "But I tell you that anyone who divorces his wife, except for marital unfaithfulness, causes her to become an adulteress, and anyone who marries the divorced woman commits adultery"), but it does not, in my opinion sanctify second marriages, even in death. The promise on the altar is, after all, made for as long as you BOTH shall live.
Perhaps all of this sounds harsh, critical, judgmental and uneducated. But to be to lenient with such an important sacrament as marriage is to deface it, to undervalue it and even to mock it. Which may be the exact reason why the divorce rate in this country continues it's steady climb.