Survivor’s guilt (lithium) lyrics

It's only temporary
Yet it feels so cruel
Now you're imaginary
And it's getting old
I wish I could see you again
My dear old friend

What were the words I could have said?
To undo this?
I can try my hardest to replace the other side
Just to see you one more time
Shift every thought in my mind
I'm filled with delusions

If all is all
Tell me where I went wrong?
Fill the holes in my heart
I'm stuck in delusion