I'm Nobody! Who are you?
Are you—Nobody—Too?
Then there's a pair of us?
Don't tell! they'd advertise—you know!
How dreary—to be—Somebody!
How public—like a Frog—
To tell one's name—the livelong June—
Some versions of the poem  (inaccurately)  give this line as – 
 Don’t tell! They’d banish us, you know 
 – eliminating Dickinson’s inventive punctuation and changing the meaning 
 Far from feeling inferior or unwanted by the masses, Dickinson is making a choice of solitude (she knows that if she publishes her poems she will become a viral meme – but she wants to avoid that!) “Advertise” is a word with an air of modernity as well 
 Also, she’s not explaining this to the reader. “You know!” is meant to indicate “you  already know  what I’m talking about! Being relevant to society sucks”
Im Nobody Who Are You?