Its possible that they are still in love and just bored with eachother. Marrige isnt easy, you spend night and day with the same person. After a while it can get frustrating. They need to keep new and exciting things in thier life. Go out and try new stuff together.
Its also possible that they can be together and be unhappy. Especially if there are kids involved. Or the come from a background that looks down on divorce.
Once your married, if you do it for the right reasons, your two souls become like one. So, its possible for them to still love eachother. There is always a little place in you heart for someone you spent a lot of time with and had a lot of good memories.
Okay Im done rambling, hope I made some sense.
