It’s just speculation, but according to Professor James Krasner, who teaches literature at the University of New Hampshire, Harry won’t die in the Deathly Hallows:

Why won’t Harry die? Because it would be a worse story if Harry died, and she’s a good writer. The genre she’s writing in (the British school drama), the main character doesn’t die. (source)

Then again, only our girl JK Rowling really knows at this point.
Join the discussion on Book Seven in The Three Broomsticks!