Practice makes perfect and you have to be determined to stick to detaching and not reacting to the things he says and does. GALing is the best way to keep your focus on you. Find things to keep your mind busy, but also things you enjoy. A good book, movie or hanging out at the coffee shop work as well.
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.