I know you didn't fall off the turnip truck yesterday--I'm just curious why you've made yourself so comfortable in that ditch!! You say you separated from your W for a time over the issue, and things improved for a while. My question is, what made you stop thinking "I will not be in an SSM" once the sex dried up again? As the months passed into years, what made you lose the resolve you'd once shown? (And don't say, "I thought she'd change"--that's just like the lies beaten wives tell themselves.)
Why did you keep showing your W that if she blocked any efforts you made a few times, you'd give up on that? You wouldn't do that if your children kept defying you on a particular issue, or your pet. What did YOU gain by presenting yourself as the guy who has always been "right" in each interaction with her?