A: in the view of hyena's reply above, i could contend that very few people don't feel flattered by unrequited love, no matter how much they show they're angry. i imagine that most "how-dare-you" reactions are for the benefit of the viewing public, or one's own superficial self-esteem, while in our heart of hearts we (almost) always throw our own ego party. obviously this is not without its limitations. a feeling of genuine annoyance might prevail when the raptured soul belongs to the freaky next-door neighbor, and in much the same way i'd consider it downright mean to get angry if bearing such feelings was a close friend we hold in high esteem. besides, if you define that love as "unrequited", you're already assuming the recipient has decided s/he can pick and choose, at least when it comes to that specific would-be lover.
Q: mine wasn't even an opinion.