And no ... not Mayer
Eww.
There was in fact
actual meaning of "Dear John Letters"

Now that you're gone, my heart's in a bind
No words on paper, no thoughts in my mind.
You were the spark, the flame to my fire.
Now I'm left with only a mournful choir.

All I needed was the last thing I wanted..
To be alone, heartbroken and haunted.
I tried to write but nothing comes out.
My inkwell's dry, my pen's a drought.

I struggle to find the words to say?
The thoughts and feelings that won't go away..
I search for inspiration to help me cope, but
my heart's too weak, too full of hope.

Now that you're gone, I can't seem to find
a path to peace, a state of mind.
I'll keep trying, though it's tough
to put words on paper and for it to be enough.

For you were the muse that lit my flame
and without you, it's just not the same...

but I'll keep writing, I'll keep trying.