Sometimes when you've been hurt enough times by someone you put less emotional investment in that person. I know I was married for 5 years and had rough times towards the end.... When he asked for a divorce, I agreed and didn't feel much of anything. Maybe just a little sad, but I wasn't broken up about it.. I pretty much expected it.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen