The Grave Stone

Many years ago I went to the cemetery to find
my brother's grave, but he had not been dead long
and had no stone. I was sent a picture, his stone is big
full name and in loving memory, the whole clan must have
chipped in it looked costly.
I felt slightly envious I can get a big stone too if I pay
for it now, the blue marble will be lovely.
I'm hesitant to invest in my stone, just in case I live
Longer than expected. You never know with people like me
I have all illnesses you can think of, but I keep waking up
In the morning, eat breakfast and take my medicine
and as usual, I'm grumpy, complaining I don't laugh much
but I'm here to everyone’s chagrin.