Hardest letter to write

Dear John
That's how they usually start
Wishing upon the stars
That this pen didn't say
What it did.

The day arrived
Took us all by surprise
And explained.

Loneliness didn't seem so cold
It felt safe, alluring
Never understood why
It took so long to write

Didn't die over night
Kept eroding
Faster and stronger
So sorry

Please don't hate me
For the hardest letter to write.