Goq, I am saddened to hear your pain, but I would hope that, in fact, you are misinterpreting her gestures and she has nothing against you.
I wouldn’t be surprised if she just heard that gemara about Uncles marrying Nieces and that kind of threw her and she was shy and confused because of that…also, young people do some strange things, both of which others have noted.
I’d be surprised if she actually intended to make you feel bad, though I obviously don’t know the people personally. I hope you can keep a good relationship in the future, BE”H, once this phase has passed.
Many simchas for all of you!