Angel tries to undermine Spuffy's relationship

In this fic Buffy and Spike starts dating after Buffy ends it with Angel for good. I remember that Angel wasn't aware who Buffy was dating but only knew that Giles and Joyce supported her new relationship. Angel then goes to get his soul anchored by sleeping with the Muses even though he claims he "loves" Buffy. I know Angel finds out she's dating Spike, but I'm a little fuzzy on those details. I believe it was a season 3 fic. I hope someone can help me with what little I remember. Thx

I think you might be after this fic (the whole soul anchoring comes up in Chap 11)

Trust by jackofspikes

ScoobyDawn
Thank you, that's it! Spuffy fans are the greatest people in the world, I bow down to your greatness. Now I can kick back and relax and enjoy as long as my boss doesn't call me back in to continue to cover a no-call, no show.