is there something wrong with the life principle"as long as

is there something wrong with the life principle"as long as I am happy...
some friends advice me not to think too much of
worldly affairs and worries,just keep going on
your own way as long as you are happy.it seems
that this slogan is someones' life principle.
I just partly agree with this pricinple.
if you only care about your good feeling or
emotion,you seem to be too selfish.But you
can not go too far,that's to say,just ignore
what happens around you or your boss's face,
or just pass away when someone is killing
someone on the street.I can't ignore this
things happen.I can't ignore cheating
around you when our world value declines
in this society.no,absolutely not.any way,
all these things make me sick and annoyed
all the time,I am just thinking of giving
up,so many friends ask me to go another
way,just please myself as long as I am
happy.what I dislikes is becoming what
I should stick to.