Amazing. I read that post and thought, "I was in exactly the same place when I was 38"! I'd down quite a few pints or glasses on Friday and Saturday nights, but would stay sober for the rest of the week. But that gradually deteriorated, especially as my marriage started to fall apart. Of course, the boozing and the marital problems were related.
I began drinking other nights, and sometimes even during the day. It got worse. Last year, I was drinking several days per week, to the point of blacking out. Sadly, I still haven't completely given up the booze, in spite of the fact that it's making me ill.
Don't let it get the best of you, my friend.