I think I would step back a bit and allow him to come to you in the way of conversations. It's called going dim, not dark. If he asks you something, respond in a polite way. Think of him as a roommate at this time.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
