Who was in the wrong. So I am not going to list names, just explain what happened.

So I was interested in this girl, let's call her "Becky"

I was interested in her for Months, but she was with a guy we will call Zacharia

So Zacharia and Becky were together, and I was the third wheel, and months pass, she has been with so many people, and then I finally be with her, she already is with more people and says "Oh, it's just a Poly" and I was blind, so I went along with it. A few days pass, and she hasn't talked much, so I check on her, and guess what, she is sexting with other guys, already talking with other girls, and I was...beyond mad, so I stopped talking to her and moved on.

I then met these two girls that we had our own Poly with, but then I decided I wanted to be with this girl, who we will name K. So I am with K and the other girl (Who left and I plan to tell Becky about this, but she finds out already, and accuses me for cheating. My defense was she has been cheating on me and use the Poly excuse, but..a whole bunch of stuff went down. I found out about the other guys, and I actually felt bad about it...until I read what she sent to another dude which was "(My boyfriend cheated on me, and I am through with him, so I am single now, yay!)" and told another person I was talking with 4 other girls, it was only 2 and I didn't even like 1 of them. There is so much I want to say about what happened, but I am done with this. I just want to know who was in the wrong. I admit it's my fault for not letting her know beyond hand, but I was done with her. I still care about her, but have feelings for K now. If you have any questions, let me know and thanks for everything. If you are reading this Becky, I am sorry as well.