This girl isn’t satanic.
She IS Satan, in the flesh.
Agreed.
So two possible scenarios, First, she was some evil Lady Macbeth type evil whisperer who was out to have him kill himself to amuse herself. Or Second, she had tried to urge him to get help and failed, so she stupidly thought if she pushed him he'd chicken out and finally get help and ooops, he succeeded. It's not a slam dunk based on the story posted which of those two scenarios it is.