what can i do to stop the white smoke coming out of my exhaust pipe all the time

is there oil in the valve covers? if so the head gasket could be blown

Sounds like a blown head gasket... White smoke is an indication of engine coolant getting into the combustion chamber, i.e. coolant leaking into the cylinders and steaming out of the exhaust. It's also gonna fry your catalytic converter if you keep driving! Between replacing head gasket and all machine shop work, minimum about 850.00 usd... Good luck!