Using spacers for rims

I have four new tires and rims for my car. Problem is that the tires on car right now are low profile, and size fifteen. The new tires are size sixteen. The new rims do not fit because of an eighth of an inch difference in the size of the hole that goes through the rim onto the car. My boy friend says that he can put on spacers that will make the rims fit on my car. Is this possible? Safe? And, cause problems with control?