yes i'm sad, but Harry Potter did not die. Instead of killing Harry, Voldemort's Avada Kedavra killed the piece of his own soul that was attached to Harry and that made him the seventh Horcrux. ... Harry had a choice at "King's Cross"; he could head back to the world of the living and try to make a difference, or he could "take a train".
I really like the books, so watching the movies usually just makes me mad about all the things the movies changed/left out/did wrong.
My favorite Harry potter film is Fantastic Beasts, since it's an original story and I can just enjoy the film set in one of my favorite fictional universes without my brain constantly comparing what happened in the books to what's happening on the screen.