Chatting with a boy who has a crush on me, telling cold jokes and apologizing, and then being hacked by him, it hurts my heart. Last time he accidentally said that he had kidney deficiency, I

Boys are more concerned about these topics. Maybe what you said just touched his thunder point and made him unhappy, so he hacked you directly. In this case, even if you apologize, he will still have a knot in his heart. Just ignore it and treat it coldly. Boys who get angry because of a joke are a little petty. Don't think too much.