The things you did for your friend are amazing!! There is something we call boundaries, and you just need a little fine tuning on your own set of boundaries..read "Boundaries" by Henry Cloud. Your friend needs to hit rock bottom before realizing how to improve, and yes for HERSELF. But I am so impressed with what is in your heart to help a friend to the extent of what you did. You must have a big heart. It will be sad to have a break from your friend, but this for the better. God bless you, your friend will come around and better equipped to handle her illness thanks to tough love.