the simple thing to do is , when you see her , take a deep breath, and say hey
if she ignored you , then call it even , and you won't feel guilt about it anymore
if she talked to you , talk back but with small words and a lot of nods
then after 30 seconds , excuse yourself because you have an appointment somewhere else
that is how it is done theoretically , I have never done it, but I believe that is how an NT would do it
wish you luck, bro
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From childhood's hour I have not been
As others were; I have not seen
As others saw; I could not bring
My passions from a common spring.