Can anyone think of good stories that have Xander and Spike becoming friends? I wouldn't be right away (too easy) but becoming close somewhere in the middle. And of course lots of Spuffy goodness!

I'm looking for these as well

Coednakedslaying
Here we go round again by PETA has a time traveling Spike bonding and befriending Xander
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=7077

Dispose the Day by Sersi and Cylla
The Xander/Spike of this really appeals to me. More respect than friendship building, but it was the start of a good dynamic. I'm not sure if this link has the complete story, I just found it for this post so I haven't checked it, but I have it in pdf if you would like a copy then please just pm me your email address.

Even Demons Need Friends and sequel A Friend in Need by slaymesoftly
I have a note that there is an s/x friendship element to this but I'm not sure if it is really a main feature of the story.

I may be able to think of more but I don't have time right now, I'll try to remember to pop back later.