Hi Danielle,
Congratulations on your decision! I was in a similar position - or probably worse - 25 years ago. I never touched alcohol till I was 20, binged occasionally in my late 20s when I was in the Army (which tends to be par for the course) then started steady but limited wine consumption when I moved to a country with a wine-drinking culture in my early 30s.
I only noticed I was drinking more when I got into my mid-40s. I was in an absorbing but demanding job that I loved, and my first impulse when I got home every night was to pour myself a glass of sherry. I'd then go on to white wine while preparing my supper, then switch to red or continue with white while eating it. I suspect I clocked up a bottle and a half some nights.
I was living alone by this time (not alcohol-related) but I don't think loneliness had anything to do with it. Nor did stress. I've always noticed I don't want to drink if I'm feeling low or anxious, I'm more at risk when feeling relieved from stress or pleased with myself.
Like you, my drinking wasn't affecting my work performance or any other area of my life, and I never had a hangover. However, I sometimes continued drinking until quite late in the evening, and it never occurred to me that my breath would still smell of alcohol the next morning. (At this point I should say I've never owned a car as I live in a country with excellent public transport.) When a colleague quietly pointed this out to me one day I was mortified, and decided to do something about it.
It's actually quite easy to cut back when you're dependent or habituated, as opposed to addicted. Over the next few years, I managed to push back the time of my first evening drink. I almost never drink earlier in the day, btw. First I cut out the "welcome home" sherry altogether, then moved on to only allowing myself to drink while cooking, rather than preparing, my meal, then to pouring my first glass just before I'm ready to plate up.
I've stayed at that level ever since, and consume on average half a bottle of wine per night. My liver enzymes have always been on the high side - even before I started serious drinking - but they haven't gone up over the years. I'm now working on having one alcohol-free day per week but find this mysteriously difficult. Yet on nights when I can't have a drink for some reason or another, it doesn't bug me at all. I can't even stand the smell of the stuff if I have a cold or a sore throat. During a recent short hospitalisation following an accident (also non-alcohol related) I didn't miss it. Most tellingly, last October I sat up several nights at the bedside of a dear friend who was dying in a dreadful psycho-geriatric unit, to protect her from sexual assaults etc. at the hands of the other inmates. I slept during the day and stayed awake every night during that week, so there was no opportunity for a glass of wine. Even in these stressful circumstances, I never once gave it a thought - though I admit going on a minor bender the night after she died.
So... why is it so difficult to have just one wine-free night per week now?