Final answer:
The best option to describe the relation between the speaker and Fortunato, based on the excerpts given, is that Fortunato is oblivious to the speaker's feelings, which aligns with option C.
Step-by-step explanation:
The sentence 'Fortunato has hurt me a thousand times, and I had suffered quietly' implies that the speaker has been wronged multiple times and has endured this without retaliation or public outcry. The most fitting option among those provided that aligns with the information from the excerpts given would be option C) Fortunato is oblivious to my feelings. This is further reinforced by the excerpt indicating that the speaker maintained a façade of goodwill and smiles despite contemplating Fortunato's immolation, suggesting that Fortunato is unaware of the true feelings of the speaker. Additionally, the other excerpts do not pertain directly to the relationship between the speaker and Fortunato, but rather describe other situations and characters.