Is it impolite for WeChat not to reply every second?

Situation 1: the other party wanted to reply, but found you a little annoyed. Don't reply for a while, even send messages all the time. The other person is fed up and doesn't want to talk to you? Situation 2: The other party is busy with more important things at hand. When he saw that the message body had more spare capacity but not enough, he went to bed after being busy and sleepy. Many people didn't reply to this message. When he woke up the next day, he found that the message he received was asking what he had done yesterday. You don't have to reply if it doesn't itch. ? Situation 3: You said you were cold before, and you apologized? Made it up? Do you think there is any reason why a familiar person won't even reply to you, which shows how much he hates you.