When I am hanging out with my best friend, she’s asking me to give her my phone so she could take some selfies
So I give her the phone and she keeps on asking me about the passcode she wants to know it
I trust her
But I don’t want anyone than me to know my passcode because I want my phone to be private
When I ask her why she needs to know my passcode so bad she tries to get in my head with “You know mine, we are bestfriends and bestfriends know eachoters passcodes”
The truth is, I don’t even know her passcode
I knew it but I forgot it because I don’t think it’s that important to keep it in mind
And I can live without knowing it because I don’t need it

I keep on changing my passcode but she gets it again because I fall for that… and after I get home I feel guily for giving it to her.

What should I do? How can I say no when she asks for it again?