Kudos to you for keeping your head up.
I too have an out of control 40 something year old alcoholic parent. I know that it is really hard to deal with how they live their lives, and the mistakes that they make. And, the fact that you can not do anything to help them, or do anything to make it stop.
I am 24 years old, and have been put in the position at a much younger age, where I had to be the parent of one of my parents. It sucks. So, while I see your story, and I wish things had gone differently for you, I am glad to see that someone else has had similar life dramas but they are doing ok.
As much as I hate the stuff my mom does, or the way she treats me, my dad and my brother, it does make me realize how great other things in my life are. It can be hard, but I find as long as I can still do that, things aren't so bad.
It is definantly a daily struggle to just keep positive, some days worse than others. But, I am now starting a family of my own. Even if my mother can not be included, it will be nice to start fresh and have a new family, where we aren't physically/verbally abusive, and we can have positive interests.
Thanks,
EM