Mona, Leave the man alone! You are separated! Keep the focus on you and your children. The only reason you need to contact him is if it is an emergency or something wrong w/the kids. You need to start thinking about a back up plan when you need to have someone help you out.
Keep the focus on YOU and leave him alone!
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.