Praying on an unmarked grave

I'm sitting here
at an unmarked grave
praying for a person
i couldn't save

i don't know who she is
or where she is from
but i can feel her
and what she's done

she tried to save him
but she was too late
after all
you cant change fate

she went to find him
there was only one way
and thats why I'm here
on this rainy day

i didn't know their story
now I'm living it
but nothings changed
i still cant stop it

i couldn't save her
so I'm here to pray
that no other soul
will lose there way

i have no idea where this poem came from or what it means.