There are many books in the bookstore, so you can borrow them. Sure, you can buy it if you like. If you pick it up with friends, lend it to them when they don't need it for the time being. If necessary, you must return it to Zhao in full, and you also owe a friend a favor. It's easier to borrow things than to return them. Your male friend doesn't know what he thinks. Why borrow your library when you have an ungrateful library to borrow? Besides, you need it. He shouldn't abuse you. This is something that a handsome man can't do. It really surprised me.
I still hold the view that you and this male friend are just ordinary friends. If you like him, it means that he still has the ability to be appreciated, just keep your love for him in your heart. If he doesn't know that you like him, don't tell him, or he will make things worse. Leave the rest to time. A boy who really likes you won't make you so humble. Before your prince charming appeared.