He never says that, but I suppose he would :)
no
When Bella marries Edward Jacob decides to marry Bella's kid. She is Renesmee and Jacob takes care of her from small days, so that he can imprint on her some day. :)
nothing, he will just get upset
bella and edwards daughter
Because Jacob loves Bella that's why
no she did not
Victoria comes after Bella, edward kills Victoria, Jacob and Edward fight over Bella, Bella agrees to marry edward, Jacob hears them talking about getting married and is very hurt, Jacob runs away.
she marries edward and Jacob comes to their wedding
After edward and Bella marry, Jacob wants to be appart, but later renesme comes in the picture and Jacob imprints on her. So they all end up together.
yes
Bella and Edward do marry as she knows she loves Edward. Jacob was so attached to Bella because he would imprint on Edward and Bella's child when it was born. This means he is so strongly attached to her that he could never love anyone else other then her and he would always be protective of her.
No Edward is her mate and they are as one as it states in all the books.