For every 'yes' you answer, there's a greater chance he's not telling you something you'd probably want to know.
He isn't suffering an unusual amount of stress in his life, yet he constantly seems preoccupied.
When he talks to you, he looks up and to the right before speaking and avoids direct eye contact.
When you ask him a pointed question, he responds with another question.
He gets far more upset about petty annoyances - bad traffic, poor service - than normal.
You find yourself confused by mixed messages he's sending.