Lagoa Syndrome
This person is the worst kind of friend. They let you in, they get your secrets, and then they take them and tell everyone, like it’s a party and you’re the guest of honor.
'Your secret is safe with me!', she told your crush you were a cheater.
'Don’t worry, I won’t tell!', she told your mom you had a crush on her brother.
'We’re best friends!', she told your class you were a virgin.