I told him (and I think he finally gets it) that our relationship will be so different.
I told my wife this, too, during her affair. That "if you end our marriage this way, I will never be your best friend anymore. I don't say that to be mean, but I just can't do that. I will wish you well and we'll be civil and do what's necessary as the parents of our children, but that 'best friends' relationship we've always had will be gone forever."
That killed her more than anything -- but I meant it.
