Responsibility
Why is it that some people feel we 'owe' them an explanation for our decisions? We all have choices. We can't make someone do something or share something they aren't willing to or don't feel is necessary. We can only choose how we react to their decision. We can hold on so tight to our need for an explanation that we don't move forward or we choose to let it go and move on.
It is not my responsibility to make you feel better about my choices. Just like its not anyone else's responsibility to make me feel better about theirs.