@VINT64—
Properly, when used in reference to
courting behavior, the verb “flirt” is
intransitive, which is to say that it does not take a
direct object. Normally, the preposition for the indirect object is “with”, as in “He was flirting with another woman!” This is somewhat misleading, as the other person may not be flirting in response, but that's how it goes.
The
transitive uses of “flirt” referring to
striking,
throwing, and
blurting. If someone flirts you, then you have been hit or propelled!
There is an additional
intransitive sense of “flirt”, referring to
scoffing,
sneering,
jibing, or
rejecting.
The term for one who flirts is not “flirter”, but just “flirt”, as in “My girlfriend is a flirt!”