The hardest thing to do is realize there is absolutely nothing you can do to change his mind other then go out and live a kickass life and hope some day he wants to join you. There are no tricks, techniques, or ploys to bring him back. You can not control another human beings feelings.
The quicker you understand this the better you will do. These things take a really long time to completely play out and take a lot of strength and perseverance. Unfortunately there are no short cuts.
