You wished the story would go on & on & on!
Pretty much every Terry ?Pratchett fan cries when (sometimes at last) reading “The Shepard’s Crown”. It is the last book he ever did or ever will write and his estate has forbidden anyone else to use his Discworld universe. Th Th Th Th that’s all folks.
But I wasn't ready to leave your world yet!
Only all the time. Why do you think fanfic exists? Of course, some of it sucks, but a lot of Marion Zimmer Bradley's contributors to Darkover went on to develop full-fledged worlds and careers of their own.