This is after Deeks was tortured within inches of his life and he hasn't really slept in weeks. He can't relax or feel comfortable and he thinks he's not cut out to be at NCIS. He's been pushing everyone away cause he doesn't know how to deal with the trauma. So then Kensi comes in and does her thing and he sleeps. But the best part is the last thing he says, that his partnership with Kensi is a love story.