Coming from someone who has no relationship with her bio dad, I say call him. It hurts deeply to be rejected, but to know that you really tried makes it a little easier.
If things worked out you could set up boundaries, like rules. You could have control of the relationship and make it feel right for you. Does that make sense? If you had your guards in place it could help prevent you and the boys from being hurt emotionally.
Take a deep breath, say a prayer, and call him.
