I'm not going to kick you, just some constructive advice: if you try and give up and find you "can't" (say because your mood is so vile, or you just can't wind down or get circular anxious thoughts etc) there are 2 things you can do - one is go to your GP and explain that you are struggling with alcohol dependency or hazardous levels of drinking (whichever wording you prefer) - they will understand what you mean by that - and yes they may ask you how many units you are drinking in a week - don't lie - and ask for a course of Librium. Its a reducing dose of Benzos, starting off with a certain amount and reducing daily for 7 days. This is called a 7 day medical detox, and it is very helpful for people who want to give up but cave on day 2 and stuff like that. (Lots of these people will think they lack willpower but your body gets used to a certain amount of alcohol and the benzos will stop these symptoms, allowing you to safely and more comfortably go cold turkey). Its not quite as big a deal as it sounds, in that you will still be able to go to work and function and all that (possibly better than when on the booze! though you might want to start day 1 of the course on a weekend just to be sure they don't affect you weirdly).
If you really don't fancy doing that for whatever reason, a slower weaning off could work - if you really are drinking 1 bottle a night and no more, go to 2 x 250ml glasses for a week, then down to one for a week, then stop. This prolongs the "agony" though and often its best to go cold turkey whilst you are feeling motivated.
You might not need to do this if you are just say drinking one bottle of white wine a night, or even red for that matter, there's not that much in it really, but if you find you are "failing" and can't quite work out why because you have motivation, it could well be your body crying out for it.
Yes, I have been through this a few years ago
(and come out the other side fine btw - I can now drink on weekends and whilst I sometimes drink more than I should on the weekend, it IS only on the weekend so there is no physical dependency or threat of it - this would be a great improvement for you too, if you are currently drinking daily). This is if you don't go down the route of "never drinking again". Contrary to popular beliefs on the subject, you are not necessarily an alcoholic (though you may be) and you may well be able to re-learn how to drink socially and at less hazardous levels, or not, time will tell. Its different for everyone and not always black and white.
Good luck!