Yes there are cases where divorce is needed, but most of those are going to involve someone going to jail afterwards, or at least needing to. If you have children then to get a divorce simply because you fell out of love with someone is hateful at best and is like telling your children "I am too lazy to put in the effort to be a part of your life."
Those are my feelings on the matter. I realize that not everyone is going to share my view and that some people will very much hate what I have to say about divorce, but love is a choice you make each and every day. If you feel out of love with someone then it is not something that is completely beyond your control. It is something that either you have been doing wrong or just not doing at all.
This poem explores part of the process of choosing to love someone.
The Love of My Life