I have been divorced, but agree with the writer... divorce is a sin that harms us all. However, I'm the one who has been sinned against.
One poster said it before, Divorce is the result of sin not the cause of it.
Christians live under grace not the law. We are forgiven our sins as a result of Christ's grace towards us. He already knows what and when we will sin (it just happens to be every second of our lives).
That said Christ set out a narrow set of rules regarding when you can divorce and then remarry. The only reason was adultery. Adultery is not only sexual in nature, but is any form of abuse (non-loving relationship) that harms the other person. Remember Christ said of you look lustfully at a womoan you have committed adultery in your heart and it is just as much a sin as physically doing it.
The bottom line is that loving your spouse is a choice not an emotion and if you are truly attempting to be God pleasing you will choose to love your spouse period, even if you don't have strong emotional ties to them. In doing this God will bless you and in many cases provide you with the emotional attachment and excitement.