When I did my last attempt, I just wrote down on a piece of paper:
Cremation
No funeral
I still have that paper on my desk. I never thought I'd leave a note, but I feel very strongly that I don't want a funeral. Just let me die and be forgotten. I hate the idea of people having cake and coffee at my funeral, even though I obviously won't know they are doing it.
I hate my life and the misery of my illness. I hate the destruction that ME/CFS has inflicted upon my mind and body. I just want every trace of me to disappear.