I just read My One and Only by Brat and I love how emotional Spike gets when it comes to Buffy. Are there any others out there? Thanks in advance.

I haven't read that Brat fic, so I don't know if this is what you're looking for but he kinda gets a little clingy and emotional in Heart Don't Lie by Nautibitz.

It's a long series. You need to read this story first.

http://www.sabershadowkat.com/buffy/humpinglikebunnies.html

The rest is here.
http://www.nautibitz.com/fic/lb00.html

Title: Love Bunnies, The Series: A Bunny In The Oven / Heart Don't Lie / At It Like Rabbits

Author: NautiBitz

Summary: The series/saga that jumped off from a sweet (and naughty) little story about Spike and Buffy being rabbits for a night. Not as "fluffy" as it seems...

Timeline (at the start of the series): An amorphous S4 AU where Spike is working with the Scoobs, Buffy lives at home, Oz is still around and Giles still works at the high school library. Also, Anya has yet to return. Which is probably a good thing, considering she'd be really freaked out about now.

Originally Published/Completed: November 2001/February 2008. PWP Supplement added April 2009.

Genres: Romance, Smut, Comedy, Drama, Awesomeness

Length: 32 chapters | lotsa words

Awards Won: "Best Series", "Best Romance" and "Best Pairing - Conventional" from the Sunnydale Memorial Fanfiction Awards, "Outstanding NC-17 Series" Award from the Fancy Me Yours Awards, "Best Work In Progress" from the Vampire Kisses Awards, "Best Long Fiction" from the Spuffy Awards, "Best Baby Fic" from the Timeless Awards, and more. See 'em in all their shiny glory here.

This a Spuffy Classic.

Anything by dreamsofspike.