Hmm...I've been wondering about this.

Got a small numbers of my friends are thinking like this :
We're in the world to live our own lifes...

Yeah. It is indeed correct. Normally we'll think that we're born in this cruel world, and we should live with our own style/attitude. We shouldn't make a change or what just because of some others people; just like the sentence, Don't be anyone; be yourself.
I agree with it, but not fully. You know, humans are selfish creature...

When someone which possessing that kind of thinking, and he/she don't care about others feelings too much, it wouldn't be a good thing. Why?
I have a friend, which impressed me because of his kind of attitude. My friend's just apply the prinsip of that attitude 'too good', until don't know that he/she has hurt those beside him/her.
Agree?

Something being too concerned and thinking that we're the only one who's important in this world isn't nice. We'll ended up just being selfish, and wounding those which cares about us (sometimes).

So everyone out there, here's my piece of advice:
We're here to live for ourselves, but in the same time we must care about the feelings of our nearby friends/family etc...
We may be living in this world for ourselves, but also for our friends and family too. If not, why there's communicating among each other???