Why should I?

Why should you care some one who doesn't care you at all?
Once, a friend ask me the question, and I kind of disagree with her,
If no one care, then who will do it if it's not us?
Once I think that was a noble thing to do
But who really care about that nowdays? Noble or not is not the question...
People always see the result, and never looked how the result comes up,
morality becomes clothes which you can change everytime you wanted it,
Rich, poor, good or bad are instantly judged,
I tried so hard... too hard probably...,
not to letting myself washed away,
I should care more and more,
and try to understand what people feels,
But who am I anyway? A God?
in the end I carry too many guilts and pains,
so now, in these end of my time,
I surprise myself with that question,
why should I care anyone who doesn't care me at all?
yes..., why should I?