You know what's funny? Nearly everyone (that I know of, on this board) who finally just says directly and honestly what they've been thinking, get results from their partner. Usually that full-on honesty will shake your spouse up, and then you will find out that THEY actualy want the SAME THING that YOU want! Funny how that goes, isn't it?
You must've been reading different threads than I have over the years, and I've been here a loooooong time. I RARELY see any lasting successes in this area, and have personally never seen the "REALLY let them know how much this hurts you" thing work for more than a week or two.
Usually, it takes the jolt of an affair, or a divorce or separation to spur the lower-drive spouse to any meaningful effort, and even THEN, in my experience, the changes don't last.