The only one I know is Real Me by coalitiongirl. Any others?

Marching Us All to Our Graves by Arina Summer. It's a WIP but is currently being updated.

Bring Me To Life by TammyAsh666

Summary: The last request of a dying girl leads to Spike doing the one thing he promised never to do again, but he can't help feeling drawn to her. Buffy awakens to a new world full of many possibilities, but is it more than she bargained for?

Look After You by TammyAsh666

Summary: Faith is the Slayer. Her sisters are a mystical key and Buffy, a normal girl who would rather be anything but. She has always wanted more in life, to be different. The only one who understands is Spike, her vampire companion, much to her sister's chagrin. When Buffy befriends the wrong kids at school, along with their sinister father who takes a special interest in her, Spike may be the only one to bring her back, before she loses herself completely.

It's here on this site