I know, from firsthand experience, that it's a very hard thing to do to firmly tell someone that either (a) we work these issues and start to fix things, or (b) we are done as a couple. You have to really mean it when you say that, and follow through with it if they take option (b). David Schnarch doesn't call such 'crunch points' the "crucible" for nothing.
Well, that's the problem really. If I had been as tough as I should have been, we would have divorced. So it's kind of a moot point. The question now is to bring the topic up all over again, hoping we're better prepared to deal with it.