Finally! I've been looking for this story ever since you posted this since I've come across something like it many times. I've never read this story but the summary sounds like what you're looking for. Could this be it...
Fragments Of Memory By: MorbidAngelx07
Kagome's lost most of her memory, only having small fragments of it. Sesshoumaru saved her from almost being killed and she starts thinking that he's the one she loves based on her small fragments of memory. *COMPLETE*
Rated: Fiction T, Chapters: 13, Status: Complete
EDIT BY WICCAN: Just based on the first chapter content, this fic would be an MA here! NO YIMs!!