Sometimes you don't actually seek out friends; they find you instead. That's how Buffy has found her best friends. She thinks maybe it's how all best friends are found. She does know that they're necessary. She's been reminded of that over and over again throughout her life.

"Prim is...your friend?" Buffy isn't sure. She knows a little about Katniss, but not enough to know her relationships outside of the one she has with Derek.