I think someone is going to kill themselves?

So basically, i met this minecraft player called moochielovespink and my friend argued with her, and my friend fake thoughted that she was someone on a different account, and she was suddenly so mean! And she said before, that she was planning to kill herself, and then it happened, at the end before she left, she said i have moochie and i will cut her, and left perminetly
i know that isn't a haker for real
does that mean the girl is actually doing it
i'm scared the police will blame me