I sent a lot of messages to a person, but he just didn't reply. What should I do? What should I say? Do you hate me? I have hurt it before. How can I make it disappear?

Do not use it. No matter how much you send, it's better to say it in person. In the present state, any information you send will be ignored, and if you send too much, it will even be annoying. If you have something to say to your face, you should be honest and respectful. If the other party really can't accept it, don't harass them again and give each other a space and dignity.