Question

How would you say goodbye in Spanish to someone you won't see for a long time

Answer 1

You would say Hasta La Vista, in other words see you at a later unknown future date

Answer 2

Adios familia o hermano, los voy a extrañar mucho. No nos veremos en mucho tiempo pero nunca me olvidare de ustedes. Los amo much y espero verlos pronto. Hope this helps :D