I was missing the one piece that wasn't in the box

You got your puzzles,
 and I sit with them sprawled across the floor
 like the hot summers
 where we laid on cool kitchen tiles.
 How I searched for cheats
 in the sweat that dripped into your eyes.
 I struggled with 100 pieces
when we were still beginners.
All your parts,
used to be so easy to fit together.
Advance to 500
 cause I thought I was the expert on all
 your little details.
1000 pieces were the end of me.
1000 pieces and completion is a chore.
1000 pieces and not a damn one of them
 will ever be a surprise again.