I should be who i want to be or just be the one the others want me to be??

I m 21 years old and now get a college education. I think this is a very important period,cause any choice i do for my life will affect or change my whole future.
sometime i think my life just like a routine that is the similar with anybody else.
i need to finish my college and then get a job, work ,married,children,retire,death!
but i don’t want to work for money , i don’t want to married with girl because i hate the married life and i hate the complicated and sucked human relations .hate the pressure, the expectations anybody else give to me!
the folk in life just likes puppets, i want my self’s life!
and everything just make me feel confused, i cant get what i want and i cant be who i really want to be. i think my dream are really simple and easy for somebody else,but my parents,my environment of life and the pressure, the expectation somebody else put on me that is not my own expectation, all of these force me to choice my life with their way,their mind!
I should be who i want to be or just be the one the others want me to be??
but if i chose to be who i want to be ,that will make my parents my friends and somebody else disappointed! but i love them.
i just so confused for everything and i want to change it, i want some ,maybe, suggestions that are out of experiences ,i hope life would become not so fucking hard any more.I hate my life ! I hate myself!!