narcissists and co-dependents

Individuals with avoidant and anxious attachment styles, also known as narcissists and co-dependents, often find each other and form unstable relationships. In this forum, define the notions of narcissism and codependency. Then explain why the two types get attracted to each other and why their relationship tends not to last. You may use the readings or the internet. But rephrase everything using your own words.