I have a good freind.... one of my best freinds, and his mother in addicted to crack. I know this isn't the same situation, but she tells him one thing and then does another. His life has been messed up because she has been doing crack since the early 90's, off and on, but never a good mother. I would say stay a good freind, cut the relationship, let her know you are there as a freind, but not as a lover or that kind of relationship. Do you want to deal with that the rest of your life?