The answer to the question shows a lot about who you are and what you think of marriage. When created in the book of Genesis, God states that the man and the woman become one being. God puts them together. That would generally mean that they are together for life, and the rest of the Bible text on the subject seems to back this up.
However, there is some discrepancies when it comes to adultery. Jesus even restates it in the Gospels that divorce was permitted in the case of fornication (before the wedding vows) or adultery (after the vows).
Now, there’s a movement to change the terms in the vows to reflect the fact that couples are not going the distance:
People are now searching for vows that could replace the words ‘Till death do us part’, ‘For as long as our live’. They come up with the vows ‘For as long as our love shall last’, ‘Until our time together is over’ which they call more realistic vows but others said that would be recipe for failure marriage.
You see, society has succeeded (in the majority) of defining marriage by love. There are many ways that this has been done, but the point is that the Western world believes that they must have love to have a marriage. If they do not have this emotion, then (other than children) there’s really no reason to still be together.
Now, I’m not saying that we should not foster love in our relationships, but what I am saying is that marriage is more about commitment than feelings, and if we want to see marriages last longer we’re going to have to change the concept of why people get married in the first place.