You WILL someday snap at your child. It is inevitable. But snapping at him once or occasionally, will not destroy the trust you are now building with him. Children who are loved, who have been loved, who have a background that is for the most part consistently safe and loving, are not destroyed by momentary, infrequent and mild outbursts by their parents. They just learn that their parents need some space now and then, just as they do. And they have the opportunity to learn how to accept an apology. So, don't worry so much.