How to reply if you don't receive the message?

Don't go back yet. Generally speaking, boys are more active, but you haven't heard from him all day. This means that he may not like you very much. I'm not interested in you and don't want to have further development with you, so I won't give you information for fear of causing your misunderstanding.

If you chase too hard at this time. Busy sending him a message, but everyone will be embarrassed after he refuses, so wait a minute and take your time.