what does "bye" mean to us?
If i have lived with you, or worked with you for 10 years, and now i'm leaving, to a place far away, where our lives will not cross except unless we make an out of the way phonecall, which might not be practical if say we both have our own families or work and chatting with friends far away via phone is not a luxury we want or can afford, then will a simple "bye" suffice? Or should it come at least with a handshake? A hug? A look into the eye? "Goodbye"? "Will miss you"?