Saudade: A very Portuguese word ... sad but positive, I think

“Saudade: a Portuguese and Galician word for a feeling of nostalgic longing for something or someone that one was fond of and which has been lost. It often carries a fatalist tone and a repressed knowledge that the object of longing might never really return. It was once described as “the love that remains” or “the love that stays” after someone is gone.”