How to convince the person who loves him the most without making him believe that "life is indisputable"? How to make him not believe in destiny, and not let him believe in fortune tellers?

I am the same person as you! But I try to be nice to her, let her feel my concern and make her happy when I am with her. Since you care about him so much, you should devote all your efforts to him, at least make him happy when he is with you, and don't be so negative when he is with you …