re: If I personally kill a couple fifths of liquor a week, am I a drunk?

There's roughly 17 shots in a fifth (750ml = roughly 25 oz., 25oz at 1.5oz per shot = 17).

So... 34 drinks in a week. That's nearly 5 drinks a day...

I won't say you're a clinical alcoholic, but you're a drunk in my book. I have no idea if you're physically dependent upon alcohol, but good Lord, dude, you should cut back.