Of course it involved helping her--she was failing the class, because she was missing half of the days there-- So, after the "friendship" began, I helped her to catch up on things, and ,of course, she passed the class.
That would not had bothered me all that much, if not for the way she responded to me trying to find out why she was ignoring me for, and her subsequent response.
Afterwards, I felt unsafe allowing any girls at college to make much of a friendship, as I had already been labelled a "problem student", and just wanted to finish the course, wihtout any more problems.
I still feel uneasy today, about approaching a woman. If it is another bad experience, where I get threatened again, for doing NOTHING........I just don't want to be hurt anymore.
As you figured, she was playing the old game of "Lets pretend I like you until I get what I want". It's an old game, played by both sexes, generally for different "what I want" items. You just have to get good at spotting the type (and people lots older than you still get taken).
People get mugged, too. It doesn't mean it's a good idea to lock yourself in your house to avoid getting mugged
From her reaction, she had just enough ethics to be bothered by what she did, which made her feel very guilty when she saw you, but not enough personal courage to confess what was really going on.
It's probably going to be a good idea to be more circumspect in your dealings for the rest of the semester. Dating people you go to school with has some of the same dynamics as dating people you work with: it's easy to meet people, since you see them every day and interact with them. It's also the case that once it's over, you still have to see them every day.
Of course you don't. Who does?
But if you don't take the risk of getting hurt again, you will never know the ecstacy of being in love. There is no greater feeling, no higher high, than that of being in love.