In the past both DP and I have enjoyed a drink, and have some boozy friends.
We've both cut right back, which has changed the dynamic of the friendships with people who are still drinking. When we do see them, we either agree that we will both stick at one or won't drink at all, or that this will be the one weekend in ages we'll have a "few".
I cut back intially because DP needed to for health reasons. At the time I didn't feel I needed to, but did it to support him. Since then I have found I don't want to go back to it and the weekends I want "a few" are few and far between. There are very few occasions that are worth the hangover.
On Friday we went out with a friend. He's a mutual friend, mine before DP's actually but DP has often been out alone with him. I said beforehand I didn't want a drink and DP said that's fine he didn't want to either.
If he wanted a drink I'd have said fine, I'll have a night in because I don't want to sit there and watch the two of them get drunk.
On the evening, friend is encouraging DP to drink more than we agreed and DP is looking to me for "permission". I told him to make his own decision, but I did expect that to be what he'd agreed in advance...and he knew that's what I meant, and is now annoyed with me for not "letting" him drink what he wants.
He can drink what he likes, but if I'd known he wanted a boozy eveing, I wouldn't have gone.