What should I do if I send a message to my boyfriend and he clearly sees it but doesn't reply?

The sender has no right to ask the other party to reply immediately. Because the sender must greet each other when he is free, but is the other party free? I don't know, so it is very overbearing to ask the other party to reply immediately. If the other party doesn't reply, just assume that the other party is busy. Secondly, people who see the news should reply to each other as soon as possible. The contents of the reply should include: what were you busy with before, whether you are free to chat now, and of course, ask the other person if he is free, because the other person may not be available now.