Omission

A girl you know is hurting. She's panicking. She feels lost. You see her and you know she's upset.
But you don't even ask what's wrong.
This girl commits suicide.
You didn't do anything wrong. You didn't do anything at all.
That's a pretty dramatic example, but it holds true. We see things we could help with all of the time. A door needs held. Someone drops their books. Instead of getting involved, we step away.
It's not wrong because we had no part in it. Obviously none of the consequences are our fault.
We have a tendency to ignore what's going on in people's lives unless we are directly involved. It's none of our business. We should let them deal with it.
When something goes wrong, do we have any fault? Does us stepping back and not doing anything to help make us guilty in any way?
Thanks.
Tyler.