My friends keep pressuring me to drink and I don't know how much longer I can say no

My friend group has been drinking at parties since sophomore year. I never have. Not because my parents would find out, not because I'm scared of getting caught. I just don't want to. That's it. No big reason. For a while nobody really pushed it. They'd offer, I'd say no, we'd move on. But this year something shifted. Every party, every hangout, every bonfire it's the same thing. Just one. You're so boring when you don't drink. You'd be so much more fun. Last weekend one of my closest friends told me in front of everyone that I make the group feel judged just by standing there sober. I started thinking about what was actually being asked of me. Not just to drink but to change something about myself so other people felt more comfortable. I also thought about what it meant that my friends needed me to participate to feel okay about their own choices. That said something about them, not me. I realized I'd been so focused on keeping the peace that I'd never actually said out loud how I felt about it. Every time I said no I just moved on quickly and hoped it would stop. It never stopped. The only thing I hadn't tried was actually saying something directly and meaning it. Talking it through helped me realize I didn't need a perfect speech or a big moment. I just needed to say it clearly and not walk it back. We agreed the best next step was to say something the next time it came up, not aggressively, just directly. That I shouldn't have to explain myself every single weekend and that a real friend wouldn't keep pushing after I'd said no this many times. Whatever happened after that would tell me what I needed to know about who actually had my back. I wasn't going in expecting it to go perfectly. I just knew that staying quiet wasn't working and I was done doing that.