He may want to send your photos to his friends. Boys who love to ignore reason have a clear attitude. They don't care what photos you send, and there is no positive response to what you say. Maybe his friend mentioned you by accident. When talking happily, he wants to cut out your chat record and show it to him to show your humility.

Moreover, he may have many sisters, so it takes so long to reply, which means that he is with his sister. When you send a message, delete it immediately. Just say you didn't see it.