Why is my BFF acting like this?

So, last time my friend came over (both girls) we were just sitting talking in my room. Then she said she had a game we could play. I asked what it was and she said the game was that we ask questions and we HAVE to answer them truthfully. She asked "if you could kiss a girl would you?" I said "yes but just to experiment" she said she agreed. Then I confessed that I sometimes look up videos of girls kissing on YouTube and she said the same. We then looked it up and started watching them. While we were watching ( we were sitting on my bed side by side, leaning against the headboard. Our knees were bent and she was sitting on the right side of me very close.) she put her right leg around me. We didn't say anything just kept watching. I put one of my hands on her thigh and she said "what are you doing?" I was confused because she was the one who had her leg around me right? I just took my hand away. I don't quite know how we got to this but later we were stripped of everything but our bras and underwear and we were on top of eachother feeling and touching. We didnt kiss but when we wanted to we just put our hands over our mouths. Sometimes we took our bras off but only felt eachothers boobs if we had bras on. We had our legs around eachother and we were going hard. We had music playing. I emailed her after that and said we need to hang out again. She replied yes and I have some games thatll make you horney like I know you like. I said ok sexy. And she told me I was going to far. Idk what her deal is. She says and does stuff to me but when I return the favor the gets all bitchy. I just emailed her again (it's been about two weeks since I emailed her last) and said we needa hang and that I found some new videos we can watch. Waddya think her deal is? Right now I consider myself bi curious. Not straight nor bi