"My happiness is built on my ex-wife's misery." so he's aware yet he is completely fine with it? Disgusting.
I think the point is that he ISN'T completely fine with it, which is exactly why he's trying to preserve that happiness as much as possible, cause if even that is lost, that would make all the horrible shit he did even worse since in the end, it was all for naught. (stupid ahh mindset, I know...)
That's pretty much his whole character, really. He's sincere, no doubt about that. But he's also just a spineless, gullible idiot.