Because today, for the very first time, Archer didn't cry when I dropped him off at preschool. He didn't frown or hold onto me for dear-life. Instead he let go of my hand when we reached the door and went running away from me, to his classmates.
"Bye, bye," I said, in shock.
Any minute, I thought, he would turn and run back. But he didn't.
"Looks like the tough days are behind you," the school director said, patting my back.
I waved once more. "See you soon!" I said.
Archer flashed me a smile as I slipped out the door.
And when I went to pick him up this afternoon, he was still smiling.