After a break-up with with your spouse, significant other or love of your life, you might try to remain friends with your ex, slowly cut off contact, or torch every last relic of the relationship.
But one thing is inevitable: Eventually you have to move on. So why is it that some people have a hard time letting go, months or even years after ending a relationship? Although it's natural to mourn the loss of a relationship, some people take such feelings too far.
One example at the extreme end of the spectrum, is Lisa Nowak. The former NASA astronaut and married mother of three was accused earlier this year of trying to kidnap the woman who was dating Nowak's former lover, Navy Cmdr. Bill Oefelein.
Nowak -- who is awaiting trial -- pleaded not guilty to attempted kidnapping, battery and assault, and the defense has filed notice of intent to claim temporary insanity by citing obsessive-compulsive disorder, depression, insomnia and a brief psychotic disorder.
