I never cheated, but I was extremely unhappy and always expressed this to my ex husband. You might find this story interesting:

When you have a chance to read it, keep in mind that no matter how many times I told my husband I was unhappy, he wouldn’t accept it. I would always say, “When was the last time I told you I love you?” He’d say, “Yesterday?” And I’d say, I haven’t said it in months. And then I’d say, “When was the last time I touched you?” He’d say, “Umm, yesterday?” Then I would tell him it was almost a year ago. And then I would tell him it was more than a year ago. It took me more than five years of feeling nothing to leave. But there were children. And that’s another story.