lead someone a dance

lead (one) (on) a merry dance

To waste one's time or cause someone a great deal of confusion through deceitful, manipulative, or inexplicable behavior. You should have just said you weren't interested in investing from the beginning, rather than leading us on a merry dance for three weeks! If someone in whom you are uninterested is pursuing you romantically, do not lead them a merry dance—make your feelings clear from the get go.
See also: dance, lead, merry

lead someone a (merry) dance

cause someone a great deal of trouble or worry. British
1993 Isidore Okpewho Tides I will be content to lead my friends at the NSS a merry dance if only to get even with them for messing me up the way they did.
See also: dance, lead, someone