so there s no one really i can tell . but i made a mistake last night , and i really regret it . i told BF3 the secret . she said she thinks BF2 should know ; and she 's been best friends with BF2 foreeeeever , and i m REALLY concerned / nervous she 's gon na tell her .
According to the above context, answer the following question.
Why is the narrator so disheartened about what they told BF3 ?


The narrator gave up a big piece of information to BF3 .