I'm not trying to minimize your issues - after all, I have similar ones - but I think it's possible to fixate too much on this 'units' business. About twenty years ago, the 'safe' level for males was set at 28 units per week by the 'experts', then a few years later it came down to 21 units, and now it's 14. I even saw a study which concluded that no-one should drink more than one pint of beer per month. You have to wonder what's going on here - are some of these people taking the you-know-what? Do they really know what they're talking about? How much pressure is being put on them, and by whom? How much 'groupthink' is involved?
Yes, it's a serious matter, but it helps to keep a sense of perspective. You or I would have to be consuming two to three times our present intake to get anywhere near the George Best, Oliver Reed or Richard Harris category. Perhaps the type of alcoholic drink is significant as well: I suspect beer is probably the 'safest', followed maybe by wine. Spirits are where it really gets very dicey - I wouldn't touch whisky, gin, vodka, etc.
Continuing with a point I made the other day, I think household economics can play a part as well. I personally can't resist a bargain - yesterday I was going to buy a bottle of Hoegaarden (750 ml, 3.8 units, £2.99) and one of Theakston's Old Peculier (500 ml, 2.8 units, £1.59) for the evening's session. Then I noticed that it was £5.00 for two bottles of Hoegaarden, and you can probably guess the rest. From that example, one can see why anti-drink campaigners get so steamed up about supermarket special offers on alcoholic drinks.
Have you ever looked into the zero alcohol beer scene? Lidl do quite a nice Wheatbeer (£1.25) and both ASDA and Aldi offer zero alcohol Stella Artois in packs of four 330 ml bottles (around £4, as I recall). It would help if these were priced more competitively, and not as expensive as the 'real thing'. I tried these for a week or two when I had a 30-day dry spell earlier in the year. They're not bad tasting, but they didn't really win me over. But anyway, something you might want to look into?
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On a mountain range
I'm Doctor Strange