Suggest sending a book about poetics, and then tell your boyfriend that he is willing to be his eternal reader.
Suggested book delivery directory:
Zhang Zuxin's general poetics.
Poetry Construction: Form and Image: Li Zhimin
Poetic Language of Shen Ling, Fang Huanhai and Shi Zhiyan
PS: It provides you with basic and applicable books to choose from, and none of them are very expensive. In fact, you can be more specific so that I can help you better. Of course, poetry can be considered, but only if you know what he likes.