I think we believe that others care waaaaaaaaayyyyyyy more about our actions than they do. People have other things to do, and more important stuff going on in their lives.
I'm still a drinker and i'm still struggling. But I embarrassed myself so many times. SO MANY TIMES. Finally, I just realized that when I am drinking, I don't go out, I don't answer the phone, I don't type anything on FB.
I have just enough self control to cut myself off from the world to avoid humiliation.