The quote from Stephenie Meyer's "The Short Second Life of Bree Tanner" expresses the idea that belonging to an exclusive and mysterious group, like the "Super-secret Ninja Club," is far more appealing than simply being part of a conventional friendship circle represented by the term "BFF." This indicates a desire for excitement and adventure that goes beyond standard social dynamics.

The juxtaposition of the two concepts emphasizes the allure of secrecy and uniqueness over ordinary connections. It reflects a yearning for something different and thrilling, showcasing how the protagonist or speaker craves a more adventurous and vibrant experience than what typical friendships offer.