From point (1) & (2), under my theory and
conclusion, mind games is being played - all part of the art of
seduction. It's kinda difficult to explain here, but my suggested
advice to your course of action is to employ reverse psychology
upon her methods. Young-guns theory (YGT) state that the way to
attract a girl surrounded by a horde of wolves is to avoid
showering attention. Under this scenario, YGT is applicable for
this case satisfy two variables:
I) The shifting of feelings is obviously based on transitory
crushes, therefore there is no permanent effect. 'Find feeling,
etc' - are different ways of expressing this phenomenon. In simple:
From here, they want time.
II) Once jealousy take place while (I) is in effect, this happens:
commonly known to the folk as the-desire-to-be-loved. And anything
that could threaten the queen's throne from the your object of
affection, petty woman's jealousy sprouts from her heart.
What I mean by reversal method is do to opposite of what is
expected of you. She desire your attention, forbid her your
affection. She wants you to remember her, act as if you don't. In
group meeting (if applicable), talk about other girls and your eyes
should spark and the topic should be interesting with lots of
laughter.
When alone, cease reversal method and react as she
please. When time is ripe, strike. Her throne will be shaken and
she will fall from her unreachable heights.
P.S: Among all form of seduction game, I detest this school of
thought. If it does happen to me, I would return her the game in
full amount and probably more. 
Cheers