Maybe it just means that we should remember that we forgot them, or something.
7 seconds sound clip from the When Harry Met Sally... movie soundboard.
You can hear this line at 01:31:01 in the Blu-ray version of the movie.
Quote context
[...]
- And it's not because I'm lonely and it's not because it's New Year's Eve.
- What does this song mean? My whole life I have never known what this song means.
- Maybe it just means that we should remember that we forgot them, or something.
- Anyway, it's about old friends.
- The first time we met we hated each other.
- No, you didn't hate me. I hated you.
- The second time we met, you didn't even remember me.
- I did, too! I remembered you.
[...]