If you're not having pain, vomiting, etc. and you do have gallstones, you don't necessarily need to have the gallbladder out. Asymptomatic gallstones rarely have to be addressed surgically. If you start having episodes of biliary colic (intense pain, nausea, vomiting) then it would be more prudent to get that sucker out.
I had mine out in August of this year after a couple of very intense episodes of biliary colic and am suffering with that no more. But surgery is always risky and if you're not having symptoms, I would try to avoid it!