Read the following context and choose the best option to answer the question.
Context: But the more I thought about it , the more I realized that probably was n't the case at all . I mean , if she wanted her to drink with her , she 'd say something like " We should go drinking sometime " . The whole thing got me to thinking about back in the day , especially when I used to talk to a lot of people on AIM about their problems and stuff , acting as a place where people can vent . People would complain to me about other people they know , like how their boyfriend treats them like crap or how their friends are being mean and all sorts of stuff .
Question: Was he thinking of the past , present , or future ?
Options: 
A. He was thinking of the future .
B. He was thinking of a time when friends were n't mean
C. He was thinking of the past .
D. None of the above choices .


C