First, I commend your self advocating. Now, write a letter that says everything you REALLY want to say (or think you want to) and don't mince the words or feelings. Don't send that letter! lol Now, that the emotions are acknowledged, write a letter to her in all sincerity, if you still feel it's necessary. Try not to use "you" statements anywhere, but the "I" statements. Tell her your assessment of the relationship and what you wish/want. Tell her how you feel and what you can do and what you cannot do...what you don't want to have to do etc. If you expect a response, make it clear that you do, and in what form the response needs to be (yes-no?) Good wishes.