Good answers.... basically the difference between a really emotionally close relationship and co-dependency is the motive behind the actions. A good relationship has actions that support or help the other, and the expectation that the other will help you. A co-dependent relationship has one person enabling the other, and taking responsibility for their shortcomings. The secondary part of this is that the help is "taken for granted" by the person helped, and there is no returning support.
Redd