Why would a guy friend start calling you "my dear"?

A good guy friend of mine just recently started referring to me as "my dear", primarily when saying goodbye. It isn't because he doesn't know my name or forgot it. He will sometimes use my name with that phrase (like "____ my dear" or "my dear ____"). He hadn't ever done that before. He just started doing it. He also hugs me a lot (at least 2-3 times a visit) and they are long, tight/close hugs.

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Why would a guy friend start calling you "my dear"?
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