Would you ever throw in the towel on an addict?

Friend has kids, but has been an addict since middle school. We are all in our 30s now, and she has been in and out of trouble with the law 1/2 her life. The rest of our friends have been educated/employed, but this one friend can't seem to propel forward to a good life. We have all taken turns trying to help her, but whatever we help her w/ does not motivate her, it's simple a "fish for a day", and not teaching her to fish.

I have suggested to a couple of friend to simply start praying and abandon her as it is coming to a point where it seems like there isn't much hope for a turnaround left, but she has young children, and one always feels bad when kids are involved. What's sad is that she never mentions education/goals - all she worries about is how to beat a drug test, or figure out what to say before a judge at her next court date - while the rest of our friends are worrying about mortgages, maintaining marriages, keeping children fed and developing their talents.

How much should one sacrifice? What is the Christian thing to do?

Note that I am not one that has been blind to turn around. I have known people that have committed crimes, did their time, and have come to rehabilitate, have goals, and have tried to stitch together a life that has some meaning and redemption. This is not this particular friend. Her eyes are empty, her soul is tired… But if you try to help her, she'll ask you to an unethical thing… And that's 'not cool'…

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