Here are some I think you might like.
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=5927&warning=NC-17Summary: When Spike moves into a new apartment, he's instantly attracted to his roommate, Buffy. The attraction is mutual, except for one small problem- Buffy thinks he's gay.
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=36182Summary: Buffy is an artist who takes odd jobs on the side. Being a dogwalker for William 'Spike' Giles, she wishes she was more to him. Will he ever notice her, or has he already?
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=35494Summary: Buffy has had a huge crush on her roommate Spike for a long time, but one thing he said to her has been driving her crazy for two weeks. Now, she is having a bad day and decides to blame it on him.
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=34831Summary: Buffy is a university student who takes art classes on the side. What if Faith talks her into going to a class where there will be a nekkid person to draw? What if she decides it is time for her to actually have fun instead of worrying about her life? Smutty one shot, hope you enjoy!
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=37016Summary: William "Spike" Pratt is reluctantly performing a good deed when he meets Buffy Summers. He's enchanted. He's also stuck in the friend zone. Will he find a way to show her that he could be so much more before she marries someone else?
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=36988Summary: : Buffy Summers has paid her dues. She's spent years climbing the ladder at Caritas Weddings and is one final perfect wedding away from being made a full partner. No worries. She's a professional, capable of handling anything that comes her way. Of course, she's never dealt with a Best Man like William Pratt before.