So my ex gf (F16) and me (M16) broke up about a year ago because she was too clingy and suffocating the relationship

So as soon as the school year started she kept coming up to me and trying to do dive into our relationship that ended a year ago ( Meanwhile by this point she's already had a new boyfriend for about two months) after countless attempts and unnecessary blowouts about a relationship that lasted only a month a year ago I decided just to shrug her off and not play into her games

It was about at this point every day in class she would say my name I would turn around and she'd be flipping me off in front of everyone. Now I know this isn't a huge deal so every time she did it I would shrug her off or say something witty making her look childish or foolish.

But today she said my name I reluctantly turned around fully expecting to get flipped off but instead she said "I'm sorry" and nothing else, however I was weary of her apology for she's done things like this in the past and not really meant it. So I responded rather suspiciously "OK we'll see how it goes"

Then she ran off crying for a couple minutes and then came back in the class and then shot daggers at me for the rest of class am I the asshole? 