It happened at the end of the book. Harry had just woken up from his whole dream where he was talking with dumbledore. Voldemort told narcissa to check if harry was alive but she didn't give up that he was still alive she told voldemort that he was dead.
The only books I have cried over were where the red fern grows, the guardian, and marley and me. All those books were about dogs
I just teared up a little bit during the point where harry was burying dobby. I didn't get that upset over the others because nobody showed any emotion in the book it was just a few words like Fred is dead or something and then it goes back into the action.