Is there a way to trick the find my friends app on iPhone?

My boyfriend and I have each other on the find my friends app, which allows us to see each other's locations. I work until midnight which is why he has access to my location but I have a surprise for him that will require me to go to the store and pick it up… I don't want him to peek at the app and have him see where I'm cause it will be obvious what I'm doing.

Any way to make it look like I'm somewhere else? Maybe make it look like I'm a at my house?

Turn off your location services and your phone can't be tracked. Depending on what app he is using it might be possible to see the last location you were at before you turned it off like you house. Or if you shut your phone completely off or let it run down it can't be tracked either

Leave your phone at home.