I don't think you forced yourself into not drinking anymore. The reality is that most people don't feel great if they just have a drink or two here and there. It's why most people don't stop at a drink or two. It's why there are very few 'just a glass of prosecco at a wedding' or 'just some red wine at Christmas' drinkers, or at least ones who drink that way willingly (not because they are on medication or need to drive home or have small children to look after or are a carer, etc.)
The reality is that most people who have just a glass of wine with a friend could take it or leave it and don't really massively enjoy it or drink 4 more glasses when they get home. If that was the case, we'd all be drinking like that.
One thing that jumps out from your OP though is the sadness at not being able to join in because these special celebratory events are all about drinking. How sad is it though that a wedding isn't special unless people are getting pissed? Or Christmas isn't Christmas unless you are drunk on prosecco by 11am? That's not a criticism of you, it's a criticism of our society and its views towards alcohol. What I mean is, we often just take for granted that everyone around us has this really skewed view of what's special and enjoyable. Back before we discovered alcohol, we used to love Christmas! We used to love celebrating friends' birthdays! Heck, there are whole cultures and religious traditions that don't drink alcohol and they have loads of big parties!
Now it doesn't magically make it easier for you, or me, right now but one thing I'm trying to do this Christmas especially is to build new traditions and memories that don't revolve around alcohol. Christmas eve used to be a big night for drinking and then we'd all be miserable to be woken up at 6am by the kids wanting to open their stockings. This year, everyone is having a forced early night (drinking or no drinking - I'm the only sober one, but my house, my rules) and we're making the big fun stuff about Christmas morning. Because not everything needs to be about booze and I am hoping that if we start a bit of a cultural shift with us, it will just become a bit more of the norm and the rest of the family may start to follow. That doesn't mean it's easy and I do feel a bit like a loose end sometimes, but I do think these norms need to be challenged because it doesn't have to be this way. And it would probably be good if other people got out of their comfort zone too - special fun times can be just as special with a coffee as with a glass of mulled wine.