"After experiencing the anger that coursed through his body, the Crown Prince was afraid that he will turn out to be just like his father. The Crown Prince has experienced what anger can do to a person. He has been a victim of his father's anger and so has been his mother, the Queen.
The Crown Prince was afraid that in his anger he may destroy the beautiful First Princess. He had never experienced such negative emotions before that's why the Crown Prince was worried that he wasn't the right person for the First Princess. He was worried that he would turn out to be just like his King who only knew how to hurt.