Of course you're not weird, it's all just personal preference.
Just as they see you as weird for not drinking, you see their behavior as incomprehensible. Really it's the same exact thoughts, just on opposite sides.
I'll be heading to college in less than two weeks and I know I'll probably be pestered to get drunk at some point, but I refuse to. My mom briefly talked about this with me because she personally doesn't drink and has seen the effects of alcoholism on both her and my father's side of the family. (They say it does run in families, and my father used to be a really heavy drinker when I was little, but he's cut back since then. But I still won't let my choices be taken away because of the irresponsibilty of others. It doesn't really phase me.) There's nothing wrong with drinking if you're fond of the taste of alcohol and don't go out and do stupid things. And there's nothing wrong with not drinking to avoid all those problems altogether.
I've tried a bit of many kinds of alcohol before most of my American peers have because my parents are European and realized that it was better to demolish the "taboo and therefore cool" reputation that alcohol has in America....
...And yes, all my American friends and classmates here judge me when I don't partake in the alcoholic drinks, but they're still under the impression that they're the coolest things on earth for walking around Berlin with beers in their hands. I just shake my head and scoff. Drinking for fun is fine, and so is not drinking because you don't find it fun. But drinking because you think that it makes you look cool--now that's dangerous.
This right here is the problem. More often than not, people my age drink because it's cool, not because they actually want to, and as cliche as it sounds it still holds true. I have a friend whose family lets anyone 18 and over drink at parties as long as they do it responsibly even though it's technically illegal. I've been over her house and if we're alone we might have a drink, but never in a party setting, never with people I don't know - it's usually just me and her. I like the taste of some of it and I enjoy the buzz, but I'd never be irresponsible with it. I honestly don't understand the point of buying alcohol, which is more expensive than most drinks as it is, just to have so much that you can't even remember what you did while drinking.
I do think the drinking laws here should be lowered because then it wouldn't be such a bad thing to do, but just a normal thing like in other countries. No one would think highly of anyone else for getting drunk because everyone could do it openly.