Stockholm Syndrome in relationships is not uncommon. Law enforcement professionals are painfully aware of the situation – making a domestic dispute one of the high-risk calls during the work hours. http://drjoecarver.makeswebsites.com/clients/49355/File/love_and_stockholm_syndrome.html
It's a scary thing to watch when this happens to a loved one or friend. You feel helpless in how to help them. If you say anything, the abusive controlling person will even try to turn them against you!