SD: All I can say is: Bollocks. This sucks beyond all suckiness. You, one of my inspirations to continue working on this marriage of mine, have given up. Understand, I'm not upset with you for giving up. You have trudged through 25 years of neglect. You did all you possibly could.
But I have to say, I always thought to myself that if you could endure, so could I. Now...what?
Please keep us updated on what happens with you. And I'm with Honeypot. Despite the fact that Ms.SD never did much more than lie on her back and think of England, you owe her a discussion of your future plans. It's not her fault that she is a LD (possibly ND). Asking her to be anything but what she is would be like asking someone blind from birth to describe a sunrise.