I was married to my wife for 21 years and had two wonderful daughters. I was seriously unhappy for the last 11 or 12 years of the marriage and she never saw it, everyone else did but not her.
It came to a head when my mother asked me one day when I was going to leave her because I was way too young to be unhappy for the rest of my life. I had a friendship with another lady that was much more compatible, and once I was separated we began a romantic relationship.
I have been married to the new lady for just over a year now and I am happier than I have ever been. Nowadays my new wife and I travel with my ex-wife to our daughters sporting events (my new wife has a daughter the same age) and we are friends. Looking back it was the best thing I could have ever done, we are all happier now than we were.