Page "Doraemon" Paragraph 18

When the Fujiko Fujio duo broke up in 1987, the very idea of an official ending to the series was never discussed.

Since Fujiko F. died in 1996 before any decisions were reached, any " endings " of Doraemon are fan fiction.

However, it is apparent from many episodes and movies where Nobita travels to the future that in the end he does marry Shizuka, leads a happy life and separates with Doraemon, although Nobita and his friends fondly remember him.