After reading through other comments, it seems that they are all divided between either leaving your friends or staying with them (which, arguably, is a binary

After reading through other comments, it seems that they are all divided between either leaving your friends or staying with them (which, arguably, is a binary choice when stated like that). Disclaimer: Me and my friends are non-alcoholic. We only drank once or twice and have all swore off on alcohol. It's too costly, absolutely foul tasting, and didn't even bring us high. The first question to ask though, is if your friends also want to have fun without alcohol or not. It is very difficult to leave habits. 10x more if you do it alone. Strangers / new friends can help but having your current friends there with you would be the best. But if they don't want to quit / control alcohol, then it would be better to leave them or at least limit your interaction with them. You will need someone / something that can remind you and bring you back whenever you start to drift towards alcohol. So definitely get some new friends too. As for what fun activity you can do, do whatever you usually do. If you can't think of something that can take up time without alcohol, then just go walks or something. Maybe dance. Or play video games.