He may be, in his way, an estimable man, but it is not in _your_ way, and he belongs to the rank of very ordinary acquaintanceship.
If a man asks you to call him by his first name, and your friendship with him justifies it, do not hesitate to do so; but if he is the "finished" article, he will not imagine that this concession on your part gives him the right to drop unbidden the "Miss" or "Mrs." from _your_ name.
A true gentleman does not speak of a lady, even his betrothed, to strangers without what boys call "the handle" to her name.

Nor should a woman mention men by their last names only.

When a young or elderly woman speaks of "Smith," "Brown" or "Jones," you may make up your mind that the last coat of varnish was neglected when she was "finished." Always be cautious in making advances toward familiarity.

Be certain that your friendship is desired before going more than halfway.

Not long ago I heard a woman say gravely of an uncongenial acquaintance whose friendship had been forced upon her: "She is certainly my _familiar_ friend.