Why is she acting like that?

ok so my friends girlfriend said that her bestfriend was into me and thought i was y sow.e we all decide to go on a double date and thats when i first meet her. we all go ice skating so my friend and his girl kinda let us be alone so i start talking to her actually putting effort she was SOOOOOO shy and quiet and she would rarely lead the conversation so it gets to a point where i feel like shes making no effort despite wat her bestfriend said and she told me dont give up shes just shy try again so i try again and start talking to her on the ice and it goes well but then she stopped talking again and i was the only one talking and she was being shy and she actually started to skate with her bestfriend and talking to her so i leave her and her bestfriend gave her a lecture while me and my friend were talking and then it happened again later o that she went to her friend to talk to her so i give up and her bestfriend says please like she thinks yur super cute but i was done for the night so i barely talked to her the rest of the night and then when the girls mom is there to pick her and my friends girlfriend up i jus say bye and thats it. soo then me and my friend are jus there and we start walking home w.e so the next day i see on facebook that the girl is talking about me without saying my name and saying i was ewww and she didnt like me when everybody knew she ruined the night even her bestfriend was dissappointed in her so like why is she acting like it was my fault when she wanted to see me in the first place.