If Jacob was a vampire would he have already biten Bella ?

I think he would have, Jacob doesn't have the self-control that Edward does.

no because he loves her.

i really doubt that he would, like
take edward for example,. as much he wants to soo badly he can control himself because of the love he holds for her.
And i think the same would go for jacob, because he loves her , he would be able to be refrained..
but GOOD idea to think of such thing..
well thats jsut my thoughts.