She hasn't been clean for long enough yet, like someone else said, she is still self destructive. She will take advantage of anyone that will let her. She needs tough love until she realizes she has to stand on her own two feet.
In the end if she gets through everything and can stay sober, she will remember what you did, and probably feel a bit guilty about how she treated you. It's not easy helping addicts who are trying to recover, and you've done everything you can to help.
