First to know, you won't be alone. There are groups to reach out to, if you want... but you don't have to. A lot can be done online. Virtual chats sometimes make people more comfortable, should you want to go that route - if you think you're an actual alcoholic and not an "alcoholic" (if that distinction makes sense).
Second, as has been suggested, you need to get a new hang out crowd. You're hanging out with a bunch of people who center around drinking. I've done it, and I drank - and I didn't even like drinking that much; was never that good at it. The hangovers were BRUTAL. I just drink diet cokes now, when I hang out with people who are drinking. I'm not an alcoholic, I just don't like drinking =/ It's poison to a lot of people for a lot of reasons.
As for meeting people, I'd suggest (and this might be a HORRIBLE idea - I'm older, so translate it into 23) get on a dating app and put in your profile that you don't drink and would like someone who doesn't want to drink. Then, when you have one other person, the two of you can find another person or two who don't drunk, and so on and so forth. Chip away at the problem and build up a friend group, one or two people at a time, just like you would solve a coding problem.
In reading my answer, I may know why I only have a few very good, very nerdy friends =)