I gave up booze for a couple of years in my twenties, no problem. It was just a reaction against Dad who drank too much. I guess I drank a fair bit when I first became a mature student later, keeping up with all the others, but now I can generally take it or leave it. I don't usually drink on my own at home, that seems like a slippery slope.
I like to think I drink because I fancy a specific drink - a beer, or a glass of wine, or much more rarely, and usually in summer, a G and T. On a hot day out on a bike, I'm most likely to fancy a shandy for refreshment.
I think I'd worry if I just wanted 'a drink, any drink'.