I feel like that one scene in one of the earlier seasons where Ali sneaks in Emily's window (the "you destroyed me! i thought you were dead!" "but i'm not, aren't you happy i'm not?" scene) and she tells emily, once she sees she has Ali's journal, "im sure you're wondering which one is me, the one infront of you or the one that wrote in that book.... so am i" Ali has ALWAYS questioned herself in regards to Emily, it's not a new thing. People are so blind to their connection it drives me wild
Alison has always questioned herself and she’s always been evolving – even at a slower rate than most. Everyone just wants an excuse to dilute her character development because they don’t believe former liars (which were like… fifteen, at the time) can become decent people, almost as if we live in a one-dimensional world. Interesting how ignorant some people can be.