Sorry if this post doesn't make sense, but I'm still kinda in shock.
Basically, last week, my friend asked a guy out to the prom who she really fancied. He turned her down. Since then, he's been teasing her, and annoying her (I don't actually know why she fancied him, because he's treated her really badly in the past). All of this accumulated today in her first lesson, in which he teased her. She grabbed a craft knife, and stabbed him in the arm. He's now fine, but she's distressed.
I found out about this second lesson, and since then, the whole days been moving at a blur. I've spoken to my friend, and i'm fine with her, but it seems like the rest of the school hates her (this guy was quite popular). Now in lessons, people come up to me asking about her, and telling me she should be arrested. On top of this, my friend seems to think it all a joke (although she knows what she did is wrong and unforgivable, the guy she stabbed has forgiven her).
This is the first time my friend has done anything like this - usually she's all calm and clever. How can I cope with this? I feel I need to tread softly around my friend now, in case she loses it.