Boyfriends sometimes send messages quickly, sometimes every few hours, but they don't contact each other for more than a day. Should they send messages again?

The reply quickly shows that the reason why his mobile phone is slow may be that you have been dating for a long time and he is getting used to this feeling. I can't tell you anyway. I also reply as soon as I see my girlfriend's message, but sometimes I want to wait a few months after receiving her message, but it will never exceed two hours. This is not because of boredom, but I don't know much, but it shouldn't be serious. Maybe you can feel the change of his attitude towards you from his tone, and then make a judgment.