@NotMr_Smith Cheating can NEVER be an option. The wife should also understand her obligation to try and keep her partner happy. Marriage take work, but it is the greatest gift God gave us. I'm 20 years in and could not be happier.
@NotMr_Smith 5 years is a really long time. Counseling with a marriage therapist would probably have helped. But in the words and infinite wisdom of Jester from Top Gun, "You never, ever leave your wingman!". Lol.
Your wife is you eternal companion. Better or worse, sickness and health etc.