Used....pls respond

Okay to begin I haven’t been sure about my sexuality for awhile. I have always been interested in girls but I also have been interested in guys and many others. So I have been identifying to people as Pan. So I was hanging out with my friend (my best friends ex), and she came on to me. Started kissing me and touching me and telling me she has loved me. My Best friend has been broken up with her for a really long time now so I have thought nothing about it. To be frank me and her did it in her room. It was at the moment AMAZING. The next day she started acting funky. She started treating me like shit. Then she tells me she never liked me she just wanted to use me to hurt my friend. I am still hurt and i don’t know how to feel anymore. Basically I feel like trash and I need someone to tell me if I am trash. Please lemme know the truth I’m really tired of lies.