answer: #Person1#'s angry because #Person2# didn't tell #Person1# that #Person2# had a girlfriend and would marry her.
documents: #Person1#: Why didn't you tell me you had a girlfriend?
  #Person2#: Sorry, I thought you knew.
  #Person1#: But you should tell me you were in love with her.
  #Person2#: Didn't I?
  #Person1#: You know you didn't.
  #Person2#: Well, I am telling you now.
  #Person1#: Yes, but you might have told me before.
  #Person2#: I didn't think you would be interested.
  #Person1#: You can't be serious. How dare you not tell me you are going to marry her?
  #Person2#: Sorry, I didn't think it mattered.
  #Person1#: Oh, you men! You are all the same.