There's one obvious flaw in your thinking that hasn't been addressed....


Attraction can and does go away.


That's how some people become exes, and its how some people are able to remain friends or at least amicable with their exes....

Attraction is both physical and psychological... If you see him for the lousy husband / man he is, his character becomes less attractive. And once our perceptions become negative our bodies respond in a similar way. Or rather completely fail to respond.

Easiest way to make it disappear though, besides convincing yourself he's a dog, is move on to someone that's actually available, so you both can actually respond to the mutual attraction.