May I recommend a book:
Codependent no more. Here is a link to half.com.
I think you should read it.
It will give you some insight into WHY you do this and how to stop the insanity. I'm in the middle of it right now and already I SOOOOOO See MYSELF AS A CODEPENDENT. I'm not ashamed, I just want to stop the hurt feelings.....
I think it would be wise and worth your time to read the book!
http://product.half.ebay.com/Codepen...26409QQtgZinfo