hrm, When they set their minds to the date of leaving and/or separation, they don't forget them.
At least he looked at the tires for you. But, I'm sure he was suprised to hear that you knew the tire size.
I think you are very wise in not getting packing boxes for him at this time. You don't want to rush him out the door until you are ready!
He just crazy like all the rest of them! LOL!
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.