There's this comment in The Pack in which Willow says that she and Xander weren't really that close before. I can see Xander and Jesse being the best friends while Willow being the third wheel, and it's obviously shifts later on when Buffy comes to the picture, Buffy and Willow are the best friends and Xander is the third wheel.
Re: The Friend whose name we dare not speak.
There's this comment in The Pack in which Willow says that she and Xander weren't really that close before. I can see Xander and Jesse being the best friends while Willow being the third wheel, and it's obviously shifts later on when Buffy comes to the picture, Buffy and Willow are the best friends and Xander is the third wheel.