i was thinking what will happen to the cullens but mostly nessie when jacob dies what are your theries

Well, I think Jake won't die. It's easy because he can decide (with an amount of great effort) when he doesn't want to be a shapeshifter.
It's either that, or the fact that shapeshifters can't age while vampires are near and threatening other humans.
Dunno, could be I'm wrong, but I think Stephenie wouldn't do Breaking Dawn without Jacob and Nessie being together...

Bella: YES!!!!! Now we can be a family again!! (Claps hands)

Edward: Wow there really is a God!

Renesmee: OMG He's gone..... YES!!!!!! FREEDOM!!! SWEET FREEDOM!!!!!!! (Jumps up and down)

Rosalie: yes, yes, yes, YES!!!! OMG he's actually dead FINALLY!!!!! (does a happy dance)

Emmett: Thank God he's finally dead!

Alice: Awwww! My painkiller is dead.....OH WELL (Skips away happily)

Jasper: OMG im so happy because I can feel everyone elses happiness besides my own!!

Esme: YES!! I can use his fur to make a fur coat for Renesmee!!!

Carlisle: Thank god it's Finally over!! (sighs in releif)

have you read the books? Jake can't die... While vampires are around he doesn't age, and even if they weren't there if he kept on phasing regularly he wouldn't age either.. so that scenario isn't quite possible..

I think it might be hard on Renesmee and Bella at first but Renesmee may get over it and Bella may not.

He can't died.If you have read the books,you would see,that if vampires are near the people of Quileute tribe,"werewolves"-shape-shifters,can't agr,so Jake always be a 16 year old boy,looking like an 25year-old man.So it would never be the posibillity he dies.If he died though in some curious scenario.I think Bella would be able to get over it,coz she would have her Edward but Nessie,coz he is her soul-mate,she couldn't get over it never.

well....
bella may not ever completely get over it.
edward will always have sum sort of sadness deep in him.
alice will feel bad, not becuase of jakes death but becuz the rest of her family is sad.
jasper will not care but will try to control all the greiving with his powers.
emmett will laugh bout it, make the atmosphere lighter.
rosalie will secretly mourn, but put on a mask of faux joy.
esme will turn to her motherly instincts and mourn over the wolf, along with her family.
carlisle will be sad such an innocent and helpful life was put to an end, he will grieve over the wolf that helped his family a great deal.
& renesmee will wonder where the boy who cared so much for her went, making her sad when no one has the answer, she will also see and taste the sad atmosphere surroubding the rest of her family and cry for her werewolf.



(: hope i did good.

I don't think Jacob will die because if he keeps shape-shifting then he will live forever at the same age as Renesmee.