During the course of the relationship, there were tense moments, times she'd get pissed, but end up feeling guilty about fighting [and nothing inherently bad about arguments in a relationship as far as I am concerned], but other than that it was great - no dishonesty, no cheating on either side. She was instantaneously accepted into my family, as was I into hers. We spent holidays, birthdays together, we did things together on weekends, and spent large amounts of time together during the days. We also Skyped anywhere from an hour and a half to 4+ hours almost every day, closer to the middle-higher side of that time/length range.
Eventually in the circle of friends a guy joins - and she gets a crush. Eventually, much as either of us tried to avoid it, and to the shock of my other friends, it became what some could reasonably say is an obsession. At times, however, it seemed like she fluxuated, like going Jekyll-and-Hyde, from checking him out, and kinda fantasizing? to being back to the girl I knew, was ating - mainly triggered when she saw that it was upsetting her. Eventually thse feeings got strong enough to put stress on things - on herself, conflicts and all, and myself - but that was moreso the last few weeks before things went bad.
This past fall, she left me for this other guy. Basically, what happened is she left me for what she thinks is greener grass. Of course time will tell if that is true [it being greener/better] or not. Naturally, I did make the mistakes that a lot of people make after a break up, but since late, late February I've been completely no contact.
On my way to/from classes I have to pass by her [locations of classes, where I have to go to catch a bus, and trying to avoid getting mauled by nesting Canada geese, etc]. Now, up until a bit of time ago, probably 5 weeks ago, she maybe glanced at me at most. Now whenever I pass by her, she does one of the following:
1. Stops and stares at me close by
2. Keeps walking, sometimes looking at me, other times skying away, turning to avoid making eye contact, and then stares at me from a distance [often, if not always, continuing to walk, then turning around and staring again].
3. A combination of one and 2.
This has been going on for almost a month, EVERY TIME we pass by each other [which might be 2 - 3 times on those days - purely due to the necessity of taking those routes - locations of classes, where I have to go to catch a bus, and trying to avoid getting mauled by nesting Canada geese, etc]
My question is... why?
What is going on here? Or rather, what is possibly going on?