The great gatsby, English research help: In Chapter 6, Nick says, “You can’t repeat the past.”

In Chapter 6, Nick says, “You can’t repeat the past.” Gatsby replies, “Can’t repeat the past? Why of course you can!” Gatsby then describes a moment when he had kissed Daisy. Nick describes Gatsby’s memory as “appalling sentimentality,” after which Nick himself remembers a “fragment” and an “elusive rhythm.” Are these passages about Nick or Gatsby? What has Nick forgotten that he is trying to retrieve? Finally, does Gatsby misuse the past and his memories in order to enliven the present? Does this make him part of the Lost Generation?