i have a very close friend of ten years also and she is the same way. I never ask anything of her and i am always giving her rides or money or whatever. well I still havent got the courage to tell her how mad she makes me when she is so selfish but what i have done is limit how much i talk to her. mostly i only call her when i need a favore or a drinking buddy seeing that all my other girlfriends are under 21. maybe she will get the point and if not i am really getting close to telling how i feel. if you are truely sick of the drama and B.S. tell her how you feel you dont have to be rude or mean just ask her out for coffee and talk to her about how you feel she is treating you. hopefully she will listen to you and not turn it around on you. best of luck