Concept:
When converting indirect speech to direct speech, restore the original pronouns and tense.
Explanation:
In indirect speech, “he would meet me” changes back to “I will meet you” in direct speech.
The pronoun “he” becomes “I” (original speaker), and “me” becomes “you” (listener).
The modal “would” changes back to “will.”
Therefore, the correct direct speech form is: He said, “I will meet you in the library.”