answer: #Person2# split up with his girlfriend because his girlfriend stood him up and drank with another man on their anniversary. #Person1# thinks his girlfriend will regret and #Person2# will find another girlfriend.
documents: #Person1#: How is everything going with your girlfriend?
  #Person2#: Didn't I tell you? It's over!
  #Person1#: Oh, I am sorry to hear that. I did't know that you had split up. What happened?
  #Person2#: It was a few things. The first thing that happened was that we were supposed to go out for a romantic dinner for our one year anniversary, but she stood me up!
  #Person1#: Really! Did she tell you why she didn't show up?
  #Person2#: No, but I ended up finding out later that night when I saw her drinking with another man at a club near my home!
  #Person1#: What was she thinking? Did you confront her about it when you saw her?
  #Person2#: I wanted to, but I knew that if I spoke to her, I'd just blow up at her, so I decided to just go home. I called her later that the night, but she didn't answer the phone.
  #Person1#: I can't believe she would do that to you. It's so dishonest-and rude!
  #Person2#: I know. I still haven't heard from her. The good thing is that I'm so angry with her that I don't feel sad about not having her around.
  #Person1#: I bet you that she regrets what she's done. You are such a good catch! She really lost out, didn't she?
  #Person2#: I guess so.
  #Person1#: So I don't think you'll have a problem finding another girlfriend. There are plenty of fish in the sea!