Mistaken – Vikram Seth

I smiled at you because I thought that you 

Were someone else; you smiled back; and there grew 

Between two strangers in a library 

Something that seemes like love; but you loved me 

(If that’s the word) because you thought that I 

Was other than I was. And by and by 

We found we’d been mistaken all the while 

From that first glance, that first mistaken smile.