Another Theory To Help You With Your Life
The length of response to the question, "What's his/her name?" can be used to determine smittenness.
If your friend is seeing someone and it's in that beginning stage, and you ask, "What's his/her name?" and your friend says, "Bob," it doesn't look so good for Bob. Sorry Bob.
But if your friend says, "His name is Bob," he or she is smitten. The extra three words reveal a desire to spend more time talking about Bob, even if your friend is not ready to admit to that yet. Right on, Bob.
(See also: Self-smittenness, i.e., "The Real Slim Shady.")
This is a new theory, as yet not field-tested. I'd be pleased to hear your research results.