I don't think there is anything wrong with not drinking alcohol. I love a glass of brandy or wine, but don't drink more than 2 or 3 nights a week, and then it's not much. I can go 3-4 weeks with nothing some months, and then will drink several times a week for the next month.
However...........
I have to say, when people have BEEN drinkers, and they go teetotal, I find them insufferable (some of them.) Not only judgemental and moany and preachy, but also boring. A bit like some people - not all but some - who stop smoking, or stop eating meat, or lose weight. They get all smug and judgemental and really fucking boring!!!
My DH stopped drinking for 2 and a half years, (mid 2010s,) and I can honestly say I really REALLY struggled. He was a pain in the arse!
When we went out to the pub at 7.45pm say, he was ready to leave at 9.00pm, because he was 'tired.' So we'd leave, and then he'd come home and watch TV til midnight.
I'd say 'I thought you were tired.' He'd say 'well I was tired in the pub, but I've woken up now.'
People will probably say 'well YOU could have stayed.' But I couldn't. Because a) he had the car, and because we live in the sticks, it would cost £15-20 for a taxi, and b) he wouldn't go without me, but still proceeded to sit there looking at the ceiling, nursing a quarter of a glass of coke he still had left, and just sighing and yawning. I'd say 'GO HOME THEN.' But he wouldn't budge til I went.
Also, he kept making snide comments about my drinking - calling me a lush and a pisshead if I had 2 glasses of wine. AND he would make 'jokes' insinuating I had a fucking drink problem, to neighbours and work colleagues (his AND mine.) I actually went batshit at him after the 6th or 7th time in about a year. We both went to a Christmas party - one at our local pub. It was on 7.30pm til midnight. When we came home (10 minute walk,) he said 'fucking hell YOU were knocking them back tonight weren't you? 2 glasses of wine, 2 Jägermeister's, 1 half a lager, and 2 brandies. I'm amazed you have a functioning liver.'
It was a CHRISTMAS PARTY. I had enjoyed myself thoroughly, and I hadn't had a drink for a fortnight, and he had actually made a note of every drink I had had. I told him he was obsessed, and I am fucking sick of it. I actually said I cannot spend the rest of my life like this, and got to the point (in the new year) where I refused to drink alcohol in his company. He kept telling me I could have a drink (big deal! Like I needed his permission!) But I refused. I said 'you clearly have a massive issue. I believe you're projecting because you're desperate for a drink. SO, as long as we are together and you're not drinking alcohol, I will never drink it in front of you.'
About 6 months later, he started drinking pints of bitter again at the pub, and has the odd nip of brandy at home. Thank GOD. I am not sure how much longer I could have tolerated him to be honest.
tl;dr sorry! 