OP, you're drinking way too much, but you know that.
If I was you, I wouldn't just stop, because the withdrawals will be horrendous. I would keep drinking two bottles a night for a week, BUT, would switch them to lower alcohol ones - like 5 or 6% (like Echo Falls level of alcohol). So you're drinking the same volume with less alcohol.
After a week reduce to a bottle and half of it, another week, a bottle of it, then a week of half a bottle, then quit.
The fact that you don't get hangovers is worrying - it means you've developed a high tolerance to the stuff. Don't think because you don't get hangovers you won't get severe withdrawal.
When I drank, I was drinking a bottle a night, with no hangover, but got awful withdrawal from stopping - maybe I should have tapered, but I didn't. I rode it out but the first 4 or 5 days were grim.
You will feel rubbish for a week or two - so far, quitting for a few days isn't working, because you're not seeing the hangover through to the end - it will take a week to clear your body of the booze and start repairing. As soon as you return to drinking again after 3 or 4 days off, you are back to square one, without the benefits of the break.
Good luck
Soph