Speaking as a person with dependent personality disorder, I doubt that there is any way for you to stop helping her without her being mad and blaming you. It's just part of our disorder.

I agree with Skeexyks that boundaries are probably your best course of action. You might want to think of it in terms of how much you will help her. Perhaps limiting the time you spend on her issues, or limiting the number of her issues you will deal with per week or per month. But you will need to be prepared for her reaction. It will probably be unpleasant.

I wish I had a better answer for you.