<human>: We broke up early december, and continued seeing eachother over the holidays cause we wanted things to be calm. It was very good, as it allowed us to relax christmas eve, instead of being heartbroken.

We were to meet up new years, she bailed on me and went to have a threesome FFM with her friend and her friends ex. I was heartbroken, as she texted me the whole night, even agreeing to meet while she was already in the car on her way to have a threesome. We saw eachother a bit afterwards, she lied and told me nothing happened, because she knew I'd leave. But a mutual friend told me and she got caught.

I cut of all contact untill this friday, where we met whilst shopping. We slept (no sex) from friday to saturday, and she said she wanted to continue seeing me, but that she did not want a relationship with me. I, on the other hand, would like for us to get back together. She rejected me, but we agreed to keep seeing eachother.

Last night, I slept with a different girl. Unlike my ex, I told her straight away as I did not use protection, and if we were to sleep together without being exclusive, I'd expect the same from her. 

She flipped at me, called me names, refused to let me touch her. Was dissappointed, angry, sad and very lashing. I did not apologise, as we were not in a relationship, and she said she wanted to know if I slept with someone else. + she had a fucking threesome.

We have cut off all contact, but I still feel weird. I did not want to sleep with that girl, but did it anyways. 

I feel like I've been a huge idiot to her, but then again, I know I haven't. I will not be seeing her anymore, this was my first breakup ever and I did not realise the importance of 'Not seeing your ex'. I do now.

Am I in the wrong?

Provide a brief overview of the text.
<bot>: Slept with a girl whilst seeing my ex, she flipped at me and called me names, even though she already had a threesome - where she bailed on me, lied to me and I only know cause she got caught.