I know that you are going through a difficult time right now and despite the fact that you may never read this I wanted to take a moment to tell you that you have been in my thoughts today knowing what a difficult day it has been for you. I hope you know, I mean truly know that I am here for you in any way that I can possibly be.
I do not want to want to disregard or belittle the grief that you are currently facing, but I do also want to take this moment to tell you that I appreciate your friendship, support, encouragement, advice and willingness to listen to me when I feel the need to purge myself (and especially when I do so inadvertently). Those things have meant so much to me and I will never be able to thank you enough or repay for everything that you have done for me. Though we may not be of the same blood you are my family. I can only hope that you feel the same.
I hope my taking this briefest of moments during your time of sadness to express my appreciation for you (and everything you have done for me) has not been an intrusion. Thank you, beyond words. Sorry for your loss.