Not all... just her.
Its a remote possibility, but still... it fits the pattern somewhat...
Yanderes usually only kill one of two kinds of victims...
1) potential rivals
2) 'disloyal' love interests
Well... its possible that she's starting to target you in much the same way she would me... as in the second category. Trouble is... Yanderes rarely have more than one target at a time. So... since I'm still alive, that makes you a potential rival... for her own affections.
Though if this logic bomb is possible, then so is another one: that she sees herself as 'disloyal' in some way.
In which case... she'll kill you and then kill herself. Hmm... curious. This requires further study...