Hi I'm looking for fics where spike is split in 2 and ends up in love with himself but if not anything where he is split is good 2 thanks

Two Sides of the Same Coin by Behind Blue Eyes fits the bill of Spike being split in two. He doesn't fall in love with himself, but it's really, really good and she updates regularly! It's here on this site:

Set during the episode "Replacements," Toth's second blast of badness strikes Spike instead of his lamp. How will the Scoobies deal with a visitor from the past? Will they be able to restore the obligate symbiotic relationship between monster and man before it's too late?

This has Spike split in 3 parts.

Identity Crisis by SinisterChic

http://spikeluver.com/SpuffyRealm/viewstory.php?sid=30

Summary: Complete! Spike does a spell to find out who he is, resulting in himself getting split up into 3 parts (epilogue NC17)