After breaking up, I sent him several short articles about farewell. He saw them, but didn't reply to the text message. Why?

Because two people have broken up, if he is upset and upset, he naturally doesn't want to communicate with himself, especially when he breaks up. It is meaningless for him to send him some farewell messages. It is impossible for two people to be together, so he doesn't want to get involved again and doesn't know what to say. Now that the relationship has been broken, I don't want to get involved again, lest I feel very uncomfortable.