Will Jacob ever get older and eventually die?

great question. Laying out the facts:

In the books, Jacob told Bella that werewolves existed because of the vampires. Jacob also said that when they are werewolves, time is sort of put on hold.

When the "shape shifters" aka werewolves phase, they stay young until the Cullens or other vampires leave their land.

Now in answer to your question:

Jacob imprinted on Renesmee, who isn't a full vampire. I think with just Jacob and Renesmee, Jacob would age.

If the Cullens remained with Renesmee (and that is most likely), Jacob would stay young.

But, werewolves don't live forever. They eventually die. Their age is just put on pause.

I don't think there's a right or wrong answer. We may have to hear it from the author herself :)

he would have stayed young forever anyway, because of his wolf form. He said before, if you carry on changing into a wolf regularly, you never age, or die. But that if wolves stopped changing for a long period of time, they'd start aging again. so he will stay young in the same way the Cullens and Renesmee will, because him changing into the wolf keeps him yougn and stops him aging.

I think that Jacob could potentially live forever, like vampires. Wolves shape shifting gene causes a pause in aging, so as long as they keep phasing, they won't age.

Most Quileutes eventually stop phasing so that they can age again and grow old with their imprintee or mate. However, in Jacob's case, Renesmee will live forever. Once she hits a certain point of growth, she will stop growing and stay the same forever. Because of this, Jacob is potentially probably one of the only Quileutes that could live forever. He is the only one, thus far, with a mate that could live forever. I would say he is the only one with an immortal mate, but Renesmee is only half-immortal. But still, the same concept applies, and this is what I think.

wow idk.great question

Yes Jacob will, once hes finished being a wearwolf which is once theres no vampires, so i guess no, Jacob will die oce Vampires do, cuz then hes not needed.

that is something we will never know

I don't actually know the answer based on Stephanie Meyer's books or the films but in my version they carry on aging slowly until they reach about 30 while they are still phasing regularly.