Give hints but in passing that point more towards what he should be saying. Like if you like a certain nickname maybe drop that information in a joke or something. But if you guys have a relationship where he’ll laugh and not get upset then just be real with him and have a good laugh. If he wouldn’t respond like that maybe go with my 1st suggestion 🙂‍↕️

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Jst leave him for me

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U could try telling him what u like instead like “next time could u try saying something like blah blah”

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