The research shows that many couples let things go for six years before coming to counseling. Many couples go much longer, caught up in work, kids, ailing or aging parents, etc.
If you spend six or more years letting things go downhill, how long do you think it will take to turn them around and be on the upswing again?
There are many blogs here to read and discuss together. Maybe that will help.
Hopefully you've tried everything you know how to do (vs. letting it go), and it's time for outside help.
Divorce is expensive emotionally, mentally, and spiritually, as well as financially.
Care for your relationship every day, week, month, and year. And if you need help get it!
Getting outside help is not a weakness; it shows strength in judgement and caring. You just need more tools and learning around communication. You're probably even good at these things outside your home; it's hard once you cross that threshold because the greatest risk/reward exists with your partner.