[See... Joshua's not really staying. He's come. He's peered in. He's even lingering on the edges. While it's very fine and well to enjoy a time like this with other people...
It does nothing for the mood he's been in for the last few weeks. Things here have simply become like another slice of life. It's just depressing, really.
So after watching for a while, he's going to attempt to make an escape.