That sucks, Bobby. Can you guys run down to the courthouse and get married real quick like? Then would you be allowed to have two people living with you?
They tried to enact a similar "three unrelated" ordinance here in Muncie, but it was struck down because of all the college students in town. Made lots of landlords unhappy. In fact, a similar law in Bloomington, IN, was struck down by the Indiana Supreme Court as unconstitutional.
Good luck!