It's rude to tell someone to go away.
Jason has had a guest at his apartment for a few hours and Jason would like them to leave already.
Jason wants to indicate that it's time for his guest to leave.
Jason yawns and mentions how busy he is tomorrow and how he should get some rest soon.
Jason tells his guest to leave the apartment as they've been there for too long.
Jason's guest understands Jason's polite hints that it's time for them to depart, and they soon do so.
Jason's guest is really insulted and embarrassed by Jason telling them to go away so bluntly.