I have this same feeling come over me from time to time. I've been to exactly one drinking party, and I really didn't see what was so fun about it. Granted, I did not drink, but this was because I had to drive home. As of right now, I wish badly that I could finish my master's degree in computer science so I could start making money already. From there, I'll probably marry some woman because she wants my money-- I've never found "love" and probably never will, but lead programmers make good money
It's not weird to feel this way at a young age, it just isn't very common, apparently. What I really want is to have kids. At least one daughter, and at least one son. I want to see if I can be a better parent than mine, and I really mean this. Man... I need to go sulk for a little while... or not. And chase your own dreams, dude. If this is what you want, screw what everyone else is doing.