Did I tell you I blocked a school friend on facebook?
What did she do to make you want to block her?
She threatened to tell all my friends about my herpes.
It's okay to block someone who is toxic. If they are telling your business then you shouldn't have to be their friend anymore.
I don't even know why she'd do something like that.
Before blocking her, why don't you ask her why she wants to do this? Maybe you did something that, unbeknownst to you, greatly upset her.