Break Up & Divorce

He’s dating the girl he told me not to worry about?

My very recent ex husband has started seeing the girl he told me not to worry about and I feel like shit. They used to work together and attend the same gym.
I was informed they have a shared playlist on Spotify full of music he told me he hates.
Our marriage deteriorated over six months and maybe I was right in having concerns over this girl.
Have you ever been in this position and how did you deal?

He’s dating the girl he told me not to worry about?
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