Hello, I'd like a tiny bit of advice on the kiss-off email to an ex. I'm not sure whether to go down the magnanimity or honest route.
The short story is I met someone, fell head over heels in love (and he was saying the same about me). However, after a while, the ex appeared on the scene, and he has moved back in with the ex.
He has just emailed me to tell me this. I'm obviously upset, and I want to tell him he's treated me without integrity, was very flaky to have changed his mind so quickly, but the other alternative is "all the best, I hope it works out".
What would you advise?