Why would an ex take new girlfriend to places you said you wanted to go with him before you broke up?

These are long distance places so not typically near him or his usual kind of choice. He never seemed that keen to go when I mentioned them but now he’s going there with her. He’s basically kind of stealing my ideas.

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Any thoughts guys? I’m looking for genuine insight here if anyones brave enough to share some honesty.
Why would an ex take new girlfriend to places you said you wanted to go with him before you broke up?
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