What does the term "your-great-self" mean?

Question

I've moved out of my residential hall. My hallmate says to me " who could fill the void left by your-great-self?? Really? Not gonna happen!"

He says "Everyone starting to surface slowly following the post-buddy departure depression"

What does my halmate mean ?

Answer 1

your great self = jovial way of sayin you great person

starting to surface from the departure depression

the're coming back out and just getting over the previous friend who left!