Floating Around in Different Directions at the Same Time

My marriage mantra has always been "Married at 26 and kids at 30", but now that I'm 20 and a halfish, I feel like 26 might creep up a little too quickly. I wish I could fast forward and see who I am meant to be with... or even if I'll get it right on the first try. In thinking about this and spending massive amounts of time walking to class, listening to some delicious indie tunes, I've realized how much time we waste floating around each other instead of interacting. Eye contact feels abnormal when passing someone on the sidewalk. Shouldn't we introduce ourselves to each other if we live in the same apartment building? Will you think I'm a weirdo if I smile at you because I like your shoes? We all seem to be doing the same thing, but with such a strong focus on ourselves we become oblivious to the other. We are taught to live selfishly in college. Studying and learning and growing is meant to be done on one's own time. Live for yourself, better yourself, learn shit because someday you'll make more money because of your undergraduate experience. What if we became more concerned with each other? Cared about each other, helped each other out? How different would our experiences be? What if every time you passed someone on the sidewalk on the way to class, you smiled? What if that was the norm? I'm sick of floating around every day, functioning in some different frequency than the person next to me. I want to interact. I want to be friends.