Have you noticed that so many people put on a mask?

im a sopre in college and i have noticed that 50% of the people who go to mine are so fake. i think this is depressing because no one is truly him/herself. i mean of course im not either, i may hold back, but i really do try to be myself. i witness the girls acting perkier than they are; the guys acting tougher and trying to be funny/slick. it actually makes me feel not so alone, i think none of us know who we are.