Unexpected meeting (I miss you so much)

I met a stranger today.
I snuck a quick glance at her face, examining it.
I blinked.
I wasn't sure if it was really her.
Something about her eyes seemed... Off.
I couldn't tell what.
She was wearing make-up - I realized.
Her backpack was different.
It had little trinkets.
I wonder if she looked at mine.
I was stuck in a mindless cycle of looking at her, than straight forward, for as long as the light remained red.
She didn't recognize me.
I didn't even realize I've changed that much.
Maybe it was the different way I now style my hair in or the horrified expression on my face when I saw her.
And then it all ended.
The light turned green and with it, she went off in the opposite direction.
I spared a last glance at her, as she walked away, still not believing I had lost her.