did she (hazel grace) died later???? I didn't understand the ending

No, she didn't die & there was a rumor about that but John Green wrote on his tumblr that wasn't true.

link

"There is a post going around tumblr with tens of thousands of notes saying that I “announced” that a certain character in my book The Fault in Our Stars dies one साल after the end of the book.

1. I have never said, written, या thought any such thing. (Photoshop is magic!)

2. If I had said, written, या thought any such thing (which, again, I did not), it would not become true. As you’ve probably heard me say a gajillion times, I don’t think the voice of the लेखक should be privileged when it comes to matters outside a book’s text. So if I ever make such an “announcement,” I don’t think it should carry और weight than any other reader’s speculation.

I ended The Fault in Our Stars where I wanted to end it. I have never कहा anything about what might happen before या after what’s depicted in the book. I finished लेखन it, for better या for worse, and it now belongs to you."

-John Green -

Hazel died exactly a साल after Gus did according to a few sources that I have come across.

of course she didnt die, only gus did.

Of course she died, she was terminal!