I had a friend like this who I tried to be there for.  Besides me and her immediate family, everyone she knew was an addict.  She'd always have heart to hearts with me, saying I was her only true friend.  I was the only one that didn't steal from her, stab her in the back, whatever.  Not even five minutes later the addict would return, though and she'd ask to go visit whoever she was just complaining about.  It was so sad to me that her only joy in life was from drugs.  I never could get through to her.    Tl;dr she ded.