Please help me I'm in dire need of help

Ok I am 15 and I like a 14. Yo
Firstly about the 14 yo she is my sisters BFF she comes over to our house a bit
nd I think she likes me here's why..... So firstly it started when we were swimming
I was floating she was on a float my eyes were closed and I was breathing and she
Floated up and. Spit water into my mouth ikik weird then she did it again and agin
Until I left. Then a few weeks ago we were all playing twister and her butt and everything
In that area ended up to be in my face and she didn't move just laughed
Then right after tidied to see if I was able to fit under the rug and she jumped on top of my
Back and pinned me there meeting my sisters sit on me so I couldn't get up.. I turned and
Face to well you know lol and she didn't move again until I pushed her off then she tackled me into the
Closet sat on me and I couldn't get up and started biting me trying to keeP getting to bite my fingers and shoulder and hands and she kept getting closer and closer then two days ago I was talking to my sister and she was there as well laying in the bed too and she kept telling me to shut up and she kept like rubbing her foot in my face well on my face and every time I tried to move it she said no don't o
Touch me there and she kept doin it then we went outside and a ball rolled onto the ice I was gunna get it but she said nope and then she held out her hand and I took it but she kept calling me like fatass and bitch and pussy bc she kept trying to kick me and knee me in the balls as well as hitting me with a stick we the. Went inside and I started texting on the floor and she came and leaned over on my back and just stayed there trying to reach my phone staying on my back then I say down in the couch and she kept slapping me so I was like whatever then my sister went outside for a minute and she leaned over me again and bit my hand and my hand was right next to my face and se just sat there laughing looking at me but here's the catch yesterday I texted her saying that I think she's really pretty and I think I'm starting to like her and that I was afraid to tell her when she was over cuz I didn't what shed say and she was like oh on then she said but I don't think I like you the same way that you like me and I am devastated because I think she likes me and I need some other people's advice on wether you think she does or if she's just weird but also my sister heard about it and told me that she likes someone else but idk if it's true or or not so plz tell me