Well Buddy, you've left me in quite a mess. I've been trying for hours to pull myself together to no avail.
I just sit. and stare.
like an idiot.
My sweet friend. You represent the vast knowledge of music that I will never know. Even if I spent the rest of my life accumulating I would never reach your level of sainthood.
But that wasn't what you and I were about, huh? It wasn't about knowledge or ability or perfection (even though it was, indeed, all these things) we were the music. ...so much bigger than you and I. 

I'll never forget the countless moments. Me propped up on the arm of your couch, you at the keyboard. When the genius was creeping in, your breathing would grow heavy, I would start to grin, and then all at once we were on fire.
Oh, how you could play my friend.
Then we would just talk and talk, and laugh. damn.
I hope you know how I have wept for you. I honestly couldn't get enough of you. So to just leave like you did was a little selfish. I don't know who I should blame for that, but anyway...
I will love you forever. Fly on.