why?

why do we pretend things are perfectly fine when they are not? why do we think we cant tell people that we like them? i have found that things are better when you talk about them, so why do i always feel guilty about talking or "ranting"? when you know you have a short time to do something why do you always sit on you butt till it is too late? why, when your music is on suffle, does a song that expresses just how you feel always come on?