Depending on the sense you are intending :

non-judgmental, naive, guesser, estimator

praiser, complimenter, approver, brown-noser

to praise = faire un compliment [/des compliments], complimenter, faire les louanges de... (the latter being literary)

a praise (noun): un compliment, une louange (often used in the plural : les louanges)

When somebody flirts it's like a conversasion that is "spiced up" with playful comments and compliments that aren't normally issued. In most cases are a sign of affection from the complimenter. Depending on the size of the compliment shows the size of the affection. So basicly it's compliments to one that you are trying to get to notice you.

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