"I kissed a girl: Didn't like it," Curiosity killed the cat. In this case, a synonym for cat killed the cat.

It probably meant to her, more than she is willing to admit or to commit to. Probably she needs some space to figure out her feelings.

Firstly.. how long was "for awhile"? couple days? weeks? After going through something like this with my youngest daughter I can almost assure you she is not mad at you in anyway. She might have realized that she is more than curious and is afraid to talk to you about it. Maybe she is from a family that has no tolerance for anything that is not straight. Giver her some space/time to process and do not push for answers as that will most likely push her farther away.

Been there done that spoke to him for a few years afterwards he suddenly cut me off out of nowhere

Ouch. Hypothesis 1: Someone with power over her is homophobic, and disapproves. She needs to pretend she isn't bisexual or even bi-curious, and can't do that around you. Hypothesis 2: Your friend fears rejection, and is afraid of you abandoning her, so she left you first. Some people do that. It's a self-defense response to earlier trauma, and it has nothing to do with you.