some tough realizations

I realized that I m not as liked as I thought in people around me..
I realized that U can not rely on any one doesn't matter how close that person is..
I learned not to expect anything from others..
I learned that people will manipulate you, go behind your back, so better hurry and learn to do that..
I have seen most selfless people becoming selfish..
I realized that every living thing is selfish, only radius of self center differs..
I realized that there are people who will help u no matter what happens
and then there are people who'll sabotage you for no good reason..
I realized that a word of comfort  is all u need to get over any crisis catastrophic or minuscule..
I realized that you can not make every one happy even god can't, and if u r trying to do so then you are making at least one person unhappy,yourself..
I realized in order to survive in this "SOCIETY" you have to become selfish..
              In order to grow up, you have to learn to hide your feelings, to hurt someone, to be arrogant..

I guess its part of "GETTING MATURE"..
thnx for helping me understand that...