Guy greets me by calling me "my dear", showing interest or friendly?

I kind of know him, we have some mutual friends and have met a handful of times. The last time I saw him he greeted me with "hello my dear." Obviously the my means something.
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He has been flirty before.
He also tends to be a bit moody, so I don't know if that means anything.
Guy greets me by calling me "my dear", showing interest or friendly?
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