Yes, the anime only covers the first 8 out of 23 volumes so it technically has no ending. The manga is the only one that gives you an ending and is very good.Ummmm is the Anime and Manga of Fruits Basket Have different endings? i have watched all the episodes to fruits basket but never read the manga b4 though i would but idk if the manga version is good :/
To elablorate on why the curse was broken; we also learn that when the cat's words of not wanting eternity finally reached God's heart, then the spell was lifted. Kami was the one to cast the spell hoping he would be able to be with the cat forever but it wasn't what the cat wanted. So it suggests the being loved again part was only half of the cure to the spell.