<human>: My grandpa was the most influential person in my life, even to this day, 16 years later (I'm 25, I was 9 when he passed away). His best friend, whom I love dearly, has brain cancer and is due to pass on pretty much any hour now. He cannot speak and from what his wife tells me, he can barely understand anything. His daughter said, "I love you" to which he mustered, "Too" last night, that's where he is at right now. I am 2,500 miles away with no way to get there to say goodbye and comfort his family, his care didn't catch the onset of his cancers sooner, now it's almost too late. I want to tell him I love him and miss him, I want to tell him that I wish I could be there, to thank him for the good times he gave me growing up (for example he took me in my first joyride when I was 10 or so in his Mustang, took me to waterparks, etc.), for being there when my grandpa died, for being my grandpa's best friend, for all the laughs...

How could I word this as simply as possible? Should I repeat things? I don't want to insult him either. As I write this, I have work in an hour, I'll be able to reply to any advice or questions anyone has to offer after 11 EST.

Give me the gist of the text in a nutshell
<bot>: My grandfather's friend is dying, I want to word my last words to him as simply as possible, or at least make it so he can understand what I will try to convey.