So, Aurilion was dating someone else - and living with them - for 3 months without telling me, and without telling the other person that we were more than friends. When ze eventually told me, I felt lied to and when I told zir this ze sent me a scathing email full of attacks on my character, then cut contact. I was feeling upset that ze tricked me into going behind zir person's back, and I just realized that ze cheated on me too with this lie of omission. I haven't really processed that because it's such a big deal.