With my iPhone? How do I turn off my location?

So my dad recently figured out how to find out where I'm based on where my phone is. So ill get a text messages saying that he requested my location at whatever time is there a way I change that so he can't always know where I'm?
Because This weekend I'm going to a guys house and I don't want him knowing

Go to "Settings -> Privacy -> Location Services" and turn it off.