Ambiguity

Exactly why does Bartleby always "prefer not to"/ Why cant he make friend ,or communicate? Whats at the heart of his rebellion? Why doesn't he quit and get a different job? Why does the Boss have sympathy for Bartleby? what else in the story seems open to individual readers 'interpretation?

Bartleby always " prefers not to" because he is tired of everything he has been around so much sadness that it makes him feel dead inside, he probably felt this way because he worked for dead mail in the post office. Bartleby can't make friends or communicate because in a way he is already dead inside and he doesn't really have feelings, he is so tired of life that he isn't interested in getting to know anyone or being recognized. Bartleby rebels because he is tired of depression and cruelty, he is tired of the routine of his job. Bartleby doesn't quit to find another job because he doesn't want to try anything new he's used to the same thing all the time, he just wants to give up everything. The Boss has sympathy for Bartleby because he realizes the sadness of Bartleby, he sees how lonely and how disappointing Bartleby's life is or was after he died.