Left Behind

The car speeds away,
I am left behind. Again.
I remember the last smiles
The way we laughed
And I can’t help but think,
Where did it all go?

It used to be so fun, so new,
But now it is the deadliest poison
And it is killing me slowly
I need a quick fix, and,
I can’t help but remember,
The way we once laughed.

There used to be the good times
The movie nights,
The games we used to play
The jokes we shared, and,
The memories we made…
All turn to ash.

I remember your last smile,
The things you said as the door shut
The way you looked; as you drove away,
And I am left behind. Again.

This isn't my most recent poem but its one of my favorites (or at least one I'm willing to share on the internet). What do you think? How would you improve upon it?