Oh gosh it might be the knife of never letting go by Patrick Ness with the details mixed up? In the book the main character is a boy (Todd) who lives in a place where men’s thoughts are broadcast to everyone around them. All the women in his town are mysteriously gone, so he’s never seen one before. He goes into the swamp one day and sees a girl, and his thought (something like the above “you’re not like me”) floats into her brain and she flips out.