Analysis of Space filler

You know that feeling?
Lonely, empty, hollow...
We tried to make it last
but our feelings refused to stay.
They all said, “true love never dies...”
but hasn't it?
That fateful day lingers in my mind
icy chills, although it was summer.
I wonder if you think of me,
every time you hear that song.
Do you hurt like I do?
I haven't even received a phone call...
I think back to this summer,
sprawled out in the grass;
The thumping of your heart
helping me drift off to sleep.
Now last spring comes easily to my mind,
you picking fresh flowers from the garden for me.
I recall winter now,
cuddled up next to the fire.
That existential laugh of yours,
as I attempt to belt out carols.
I’m straining to recall autumn,
but its fading away from me now.
I guess it's better that way...
Numbness remains inside,
and the only thing I can think of to make it disappear
is move on…
When I wake up and see his head on your pillow
it makes me cringe.
I wonder if he knows
he’s just your space filler.