I am many times asked the following: "What is the most common reason that people get divorced?" Most people think that infidelity is by far the most common reason, but it is not.
There is really not a number one reason. Nevertheless, we hear some reasons more often than others. They are:
A lack of commitment to the marriage
A dramatic change in priorities
There are other causes we see a lot, but not quite as often as those listed above. They are:
Failed expectations or unmet needs
Addictions and substance abuse
Physical, sexual or emotional abuse
Lack of conflict resolution skills
As you can see, many of the problems can be addressed and possibly even avoided if both spouses can work together on solving them. This would usually involve some type of marriage counseling.
Remember: Divorce is the last resort - NOT the first option. Try to save your marriage first.