"I devoted my life to her and I can't even do anything on my own, she is so selfish."
I've had variations of this phrase said to me many times - it's pretty much a sure sign that this woman is living on her own planet, where she is never wrong and everyone is out to aggitate her. Likely, if you approach her abou this, she will turn it around in her mind until she believes that you are attacking her for some far-fetched reason.
That said... look, her behaviour is working for her. In her mind, she has a man, she has friends, she must be doing things right. I echo Una's question on how much you value her friendship, since she doesn't seem like someone I'd want to be friends with. If *enough* people say something, it might eventually sink in.
If that isn't an option... well, the DD only has a few more years before she is an adult and can make her own decision about where to live and who to depend on. :T