Every marriage deserves and requires regular maintenance. You wouldn't let your car go more than 3-5000 miles without an oil change and service. So why would you expect your marriage to last without some regular TLC?
The Word of god has a lot to say about our relationships. When was the last time you read it specifically looking for wisdom on your marriage? What about the vows you took? When was the last time the 2 of you sat down and re-read your vows to see how well you were doing?
Please take time now to do some maintenance, so you won't have to do an overhaul later.