I had a wife of 11 years that I had my two children with, and we were divorced on the 11th year of that marriage, and it was the best and costliest thing of my life.
I had no longer had a cheating spouse and a spouse that picked fights with me every time I took a breath. I say if you are fighting and can't get along let it go! I guarantee one of the two has already chose another mate to be with as well and another reason to let it go. I could no longer stand the cheating lying and mental abuse of my wife, and that divorce was the best most liberating thing I ever did outside of having children!
A marriage and love should be fought for if it is love, not in and with, with your spouse then it becomes a living hell.
Good luck to you friend, but this is my advice from my own personal life experience.