How should I understand this sign?

SpiningGuitar
Met this girl on a bus ride 3 years ago. Hit it off pretty well and spend time together with her on the whole trip. Walked together, ate together, took pictures together. Shortly after the trip our comunication just brooke off completely. A month or two later I try to pick up communication with her and got completely ignored.

Now to the weird part:
2 years later I started doing presentations in class (once every 2 weeks) and everytime I walk up she starts blushing like crazy and sometimes even walks out of the room.

Is that PTSD kicking in or what? Did I do something massively wrong? Like I could see that I might be at fault for not picking up communications. But it was hard too because it seemed like her friends were guarding her at the time. (So my thought was she was not interested). (Also she was teased by her friends about me for a few months).

Im awfull at catching hints and dont know if she's throwing any other ones. Just want to hear you folks out if that blushing sign means intrest or "get away from me lol"
Updates
+1 y
Made a mistake: "2 years later" its actually around 2.5-years from when it happened. That awkward interaction has been going on for a few months...
How should I understand this sign?
5 Opinion