Dear Mulder-
How in the world did you and I end up best friends? The idea still boggles my mind. I was sent to spy on you, to undermine your work, to keep you in line. Instead you've become the only person in all of this world I can trust. The truth is that frightens me, more than I can ever explain.
I wanted to keep my distance from you, God knows I tried; the professional facade with my skeptic's perspective only ever gave you a half-seconds pause. You always saw through it. Somewhere over midnight phone calls and greasy, beef ribs, over cases that became stranger and stranger, and despite every effort to separate us, we became friends. You trusted me enough to let me into your life...and to feed your fish.
For all that we have both gone through, Mulder, I don't regret a day that I was assigned to work with you or that you came into my life.
Well...perhaps I regret the flukeman.
-Scully