Question: what to say to a friend who is leaving?
Answer: “You have been my friend. ... 
“Don't be dismayed at goodbyes. ... 
“How lucky I am to have something that makes saying goodbye so hard.” - ... 
“Never say goodbye because goodbye means going away and going away means forgetting.” - ... 
“Goodbyes are not forever, are not the end; it simply means I'll miss you until we meet again.” -