The why is because she is an addict. And as much as you want college and a good life for her, the sad reality is that she is just thinking about her own survival right now. And the first thing on that list is her drug. She will do and say anything to get it. Don't let the guilt overwhelm your sense of what you know is right here. At one time I was trying so hard to convince myself that my daughter's living with her 37 year old crack addict boyfriend was about love when in reality it is about drugs. Take care of yourself. She will find a way to survive, they all do. Hugs and prayers. I know how hard it is to let go. Marle