I dated a guy; he had cheated on me several times before we broke up for unrelated problems. We ended up staying friends as the breakup was mutual.

At the time, our friendship was still sexual, but it was nothing more. As far as I knew, he was single, as was I.

Turns out he was not single. After learning this fact, I also discovered that he had slept with my best friend while we were together. My best friend did not know that we were together when she slept with him, he always wanted to keep our relationship a secret.

This made me angry, so angry. He not only lied to me throughout our relationship, but he was still lying to me, just so he could have sex.

There were two group chats that I could join, which I did. These group chats had all our mutual friends and some people who were only his friends.

I ended up telling everyone about his cheating, not only in our relationships but in previous ones. He had told me that he had cheated before and even gave me the details, so I shared them all.

Everyone ended up believing me, including his girlfriend.

The girlfriend ended up ending things with him, and he has been unable to find a new girlfriend. Many of the people he had been flirting with are now questioning him and his motives.

Our friendship is over, but I do think he learned that cheating can have serious consequences.