answer: #Person2# feels miserable because #Person2# had a bad day.
documents: #Person1#: What was that?
  #Person2#: Oh no. I broke your vase accidentally.
  #Person1#: How did it happen?
  #Person2#: I bumped it by accident, but I didn't mean to do it.
  #Person1#: It was my favorite.
  #Person2#: I feel miserable. Can I give you money for it?
  #Person1#: Maybe I shouldn't have put it here. Someone was bound to bump it eventually.
  #Person2#: First I was late for school this morning, and now I broke your vase. This isn't my day!