Okay so this is just my theory and my other friend. We believe that this theory makes alot of sense.
Theory: Harry will die in Harry Potter and the Deathly Hollows. If he does not die, it is impossible for the book to end. As we all know clearly that Lord Voldemort has his pieces of souls in different place. All hidden. So basically that means, whether you kill Lord Voldemort he will revive again and again untill he is killed seven times. Proffesor Dumbledore had destroyed one of Lord Voldemort's soul. Proffesor was on a quest to destroy another of his souls with Harry but failed, which has taken part in Harry Potter and the Half Blood Prince. The failure of the quest has caused the death of PProffesor Dumbledore. Now, one of Lord Voldemort's soul is hidden in Harry Potter himself. After Harry kills all the other souls, he will have to kill Lord Voldemort AND himself because Lord Voldemort will revive once again. It is impossible for the enemy's death without killing himself (Harry Potter). I am also guessing that is the reason why Harry Potter can vision Voldemort's emotion and sometimes what he's doing.
There you go. That's my theory. Please tell me is you agree or disagree. And also I'd like to hear other people's theories too. Thankyou 😊
Oh yeah😳...personally I NVR want poor Harry to die. ðŸ˜