My boyfriend of 4 years has told another girl that he is poly in text messages. They have roleplayed in texts that were sexual in nature. This is contrary to our agreement to have monogamous relationship. I asked him about it and he lied, denying it. Then it wasn’t him, his friend used his phone to talk dirty to this girl while asking him what to say. Then later, it was him roleplaying. He told her in the texts that he was poly, don’t yo

The message cut off and I didn’t get the rest, but I don’t think I need it. This is not polyamory, this is cheating. He violated the terms of your relationship and he lied to you about it, repeatedly. Those are both dump-worthy offenses. Dump him. Nothing to do with polyamory.