Hi, the first one that comes to mind is:
When It Don't Come Easy by Enigmaticblue
Summary: Going rapidly AU during the events of Entropy in BtVS S6, Spike makes a couple of wishes that will change everything. What is Buffy going to do when presented with a very different Spike-who doesn't feel quite the same way about her anymore?
Found this one too:So You Can Be Free
On The Bloodshedverse
Summary: Set during Season 6, Seeing Red -- the bathroom scene. What will Spike do to make himself feel better? Goes off Canon after the bathroom scene.
You should check this topic Love removal spell