I don't think that it is because it is because you are a BAD parent,...you have raised your kids lovingly. I think it is that you are a HUMAN BEING that is SCARED. There is nothing wrong with being scared, you have a lot riding on this whole situation. You value this relationship so much (and should), and your heart is empty, and your kids need you also, that it would be a very intense situation for ANYBODY. Nevertheless, you have to handle it. The situation will never get any better if you don't tell him. IF the relationship is meant to be, it will be. If not, you need to move on, for your kid's sake and yours.