I actually admire you for being able to spend 5 years of your life in that environment. I don't drink, haven't been drunk yet and I strongly avoid alcoholics. I can fully understand addiction but that doesn't mean I can tolerate alcohol addiction. Fights, ugly scenes and the rest that comes with it, lies, mess, that's not what one is looking for to spend its free time dealing with.
I admire you because this girl wasn't you friend or relative, she wasn't your responsibility. Yet you chose to stay and deal with her and the situation anyway. You were able to see the good side of things and turn this unpleasant period into something good. I guess we could all learn from you.
I'm looking forward to your other story. Well done!