Our marriage has been rocky for years. Many ups and downs. Many "close calls" where I felt like things might be at an end. We always came back.
Lately though, things were in a nearly permanent rut. We had virtually no intimacy (no kissing, closeness, couple time, and NO sex). I had virtually given up pursuing her. We were roommates. She said things, she complained, I heard, but had no more tools left in my toolbox. Also, I was suffering from "what's the point?"
As cadet said, you need new tools. That's why you're here!
So get specific. Why did things almost end earlier? What caused them? What behaviors in YOU led to them? What did she complain about?
I think you listed the two "points" about staying married. But if you read DR, there is a lot of compelling data about divorce and divorced people. If you didn't want to stay married, you wouldn't have done all the things in your original post and you wouldn't be here.