Free use for everyone

Me [M 18] and my "girlfriend" (i guess) [F 29] met at a bar last weekend. We hit it off and i brought her to the bathroom. She pushed me into a stall, pulled down my pants and aggressively jerked me off. She let me cum into her warm mouth after about only 5 minutes. Then she made out with me with her cum in her mouth, moving over to mine. Then she left the bathroom and told me to stay. She invited about 6 other people who let me be free use to them, i would fuck the girls and guys would fuck me. I ended up leaving with the girl, and we went to her apartment. I woke up in the middle of the night with her pussy on my penis and her fingers in my ass. Then she made me suck on her fingers as i came into her pussy. The next morning, she told me she didn't want to be romantically involved with me, only sexually. She told me i was the youngest shes ever been with, and then said we have to be sexually available to eachother at any moment in time. Later that day, im taking a shit, and she comes into the bathroom, fully naked, and instantly grabs my soft penis and starts sucking me on the toilet. She edged me, and made me stand up and cum in the toilet while she ate me out. The next night was the best one. I woke up with my arms and legs tied to the bed, and a boner tenting my boxer with my girl fully naked and lubed up. She reaches under my boxers and squeezes my balls as hard as she can. Then she pulls my boxers to the side and reveals my fully erect penis. She then goes to my foot, and licks her way up until she reaches my taint, where she licks and licks until her tounge reaches my hairy ass hole and she starts lickinh away. After that she goes to the balls and sucks hard on them until theyre red. Then she squeezed my dick and spits in my mouth and licks my armpits, maiking her way down to my penis, where she proceeds to lift it up and put it in her pussy. She moves into a position where it hurts for me, but feels good at the same time. Then she goes as fast as possible, and i cum right away , but she keeps going and going for about 10 minutes where she cums and then makes me lick it up. After that, she told me we needed a break and i haven't heard from her since. What did i do wrong?