See Jane Date

Jane (Charisma Carpenter) gets herself into a tangle when an attempt to outdo her old high-school enemy finds her making up a quite impressive, but imaginary boyfriend. After a nosy aunt invites this nonexistent male companion to a family wedding, Jane must come up with someone to take, hoping that by the time the event rolls around, she'll have found a real person to fill those imaginary shoes. (official distributor synopsis)