I agree...he wants you to fix things for him. Obviously he doesn't realize the things he's done to get the relationship off track.
I think this is a discussion that is best served up w/the two of you sitting down and discussing things openly. If I were you, I'd make a list and go over it w/him in person. This letter or whatever communication is bs. The two of you aren't in grade school, much less high school. He needs to man up, act like an adult and discuss this w/you in person.
Tell him that you are more than welcome to sit down and discuss things w/him. That should put the lid on the asap communication issue. I wonder what is up with that? But, don't put anything in writing except to say let's sit down and talk things out. I would allow him to go first and then you'll know the temperature of the meeting.
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.