Hi Cat,
I don't think religion promotes codependency. As Gabe says, we should treat others as well as we would want to be treated. And if someone isn't treating you well, then you shouldn't feel the need to have to deal with it, especially if it can be avoided.
Feel free to talk about codependency anytime you want on these boards. You'll find that we often ask questions that are more codie-related than A-related. It's just one more area that a lot of us work on, and this board is as good as any place else to talk about it.
Hugs,
JG