In Let the Right One In (orig.: Låt den rätte komma in), after Oskar found out about Eli's true nature and let her into his apartment he asks her:
Oskar: Who are you?
Eli: I'm like you.
Oskar: What do you mean?
Eli: "What are you staring at? Well? Are you looking at me? So scream! Squeal!", those were the first I heard you say.
Oskar: I don't kill people.
Eli: But you'd like to, if you could...to get revenge. Right?
Eli: I do it because I have to. Be me, for a little while. Please... be me, for a little while.
But I don't understand what she means with her last words. What does she want to say with "Be me, for a little while"?