"there is no physical spark for either of us, so that is all we are, best friends."
That's "all" you are?
As if there's more?
My friends have mainly been English, Poly-Sci, and Theatre people...so, naturally, THEY, through the years, have shacked up many times, and broken up many times...and MOST of those times I called, could tell from the start how it was going to end, and that's just it:
They ALWAYS end.
But MY best friend and I have had knock-down, drag-out fights, bickered for a sport, spent three months not talking to one another thanks to the fallout from our biggest fight ever...but she's had three boyfriends in the time I've known her...
I've out-lasted #1 and #2, and #3's no problem, either.
To me, there is NOTHING higher-up in connecting with someone than a Holmes-Watson, Kirk-Spock-McCoy, Kate-Petruccio sort of a bond.
"Dating" is either a best friend with benefits, or the means to an end that--let's be honest--you don't need a friend for so much as an open wallet, if that particular end is that pleasing.
Best Friends are the pinnacle...physical attraction's just a nice, gaudy attraction.
The deepest connection is when I talk to my best friend, pose her with a personal question, and we each know what the other will say, and respond in kind knowing which buttons we each can push on the other to try and win the argument, and to go all out there, pour our heart and soul into that, expose mentally and emotionally what could only be shown superficially physically, shout, get angry, even come to blows...
And be able to laugh it off as a typical meeting and grab a drink together.
Best Friends are...the best.
All gay jokes aside--at the end of the day, it's not a woman--not even Irene Adler--Holmes needs at his side, but Watson.
They're connected in a way no physical connection can ever approach.
THAT, if anything, is as close to an intrinsic "meaning" to life as anything else...everyone having their own Watson, or Spock, or Kate, or whomever.