you guys are talking as though marriage is like a car, a house, a boat, or etc. When you get bored, change it.
After almost 25 years of marriage, I fine myself with no other woman than my wife. Yes, I'm not going to lie, there're days. But, I still sees the same person that i felt in-love with some 25 years ago.
with that said. good luck and do what you think is best for you.