Did you just text him?
assistant
I’m really sorry you had to see this.  Did he cheat on you with your friend?
assistant
I keyed my ex-boyfriend's car because he cheated on me.
user
I’m sorry you were betrayed and hurt.  It’s good to express your emotions so you can move on from the pain, and have some distance from this situation.  Can you tell me more about what happened?
assistant
I found him in the back of his car with my best friend.
user
Oh wow, that must have really hurt.  Were they kissing?
assistant
Yes, and they were naked.  Now he will regret it.
user