Aww, I loved Big Bad Boyfriend
I don't know if these are what you looking for, but:
Once Upon A Blind Date by Ashlee [R] (AH)
Summary: Based on The Wedding Date – Buffy Summers hires charismatic William Blake to accompany her to her sister's wedding – finding out that a weekend with a strange man is exactly what she needs.When Stars Collide by wattie [R/U] (AH)
Summary: Buffy Summers is a young aspiring actress who is a recluse. William «Spike» Simons is an famous actor who is coming out of a bad break up with his long time girlfriend Drusilla. In order to boost there careers their managers set them up in a fake relationship. But how fake will it end up being?Drive Me Crazy by Kate [R] (AH)
Summary: Anxiously awaiting the year's biggest high school dance, popular and preppy Buffy figures she'll have it made once her crush, Angel, invites her to the big event. But Angel invites another girl instead and leaves Buffy desperate for a date. So, she implores her ex-childhood best friend, current punk next-door neighbor, Spike, to accompany her , and to make both of their ex's jealous -- and soon realizes he may be the guy she wanted all along.
