Well... in the sense that he is part of the entire group and not just Buffy's, my fic fits that description. It's not finished but it's pretty long and Spike is part of the gang and Buffy is not at all, she is the one who comes to Sunnydale and becomes friends with them all, not just Spike. It starts out about Buffy only, then Spike starts to appear in it on his own, until later when they finally meet along with the rest of the cast in Sunnydale. So....there's that whole vibe from the series that Buffy is the outsider getting to know everyone else, including Spike who is an established part of the Sunnydale group.
The Song Remains the Same by SMac
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=17766&warning=NC-17Summary: Life can be difficult when you are fifteen years old with a baby and few options. Fortunately Buffy Summers is a resourceful girl. Spuffy.I CANNOT believe I just rec'd my own story. That never happens.
