Perhaps it's because the conversation between you and your boyfriend is too fictional or your boyfriend has a strong interest in the plot and characters of the novel, so when communicating with you, he often transforms the conversation into the plot and characters of the novel. It could also be that your conversation was too short and lacked actual communication and interaction, so your boyfriend felt that your communication was like listening to a story. In this case, you can try to increase practical communication and interaction to make the conversation more interesting and meaningful. If your communication with your boyfriend has always been in this strange state, I suggest that you explore this problem more deeply to find out the reason and try to solve it.