Is the gallbladder necessary for my live?

No. The gall bladder is a muscular sac that stores digestive enzymes (bile). Many individuals under go a procedure known as a cholecystectomy, which is a removal of the gall bladder due to gall bladder disease and live normal lives.
No. The gallbladder is a storage device for bile, which is made by the liver. It acts to store the bile until needed by the digestive system to help with fat absorption following a meal. 500, 000 americans have their gallbladders removed each year, mostly for gallstones, and do just fine. You do not need your gallbladder for life, but there may be some side effects of having your gallbladder removed.