I know my original post was terribly long, so I wanted to point out again that my H told me "no wall, no matter how big, would have stopped him from proceeding ahead with what he was feeling he had to do." He made sure I understood it was not about me, I couldn't stop it, nor did I cause any of it. He emphasized repeatedly that this was all about HIM. (and not me, or the ow)
Of course, at the time, we LBS's cannot fathom this and we assign blame to ourselves because why else would our husband's walk out?
Most of us really marry only once. First love endures, even unto our dying day. And we never really divorce.