Admiration, Secret

A librarian should never order flowers and have them delivered to him-/herself at the reference desk (unless you want to make your coworkers think that someone actually loves you).

Affection, Public displays of

If you happen upon a couple engaged in sexual activity in the library, always allow them a few minutes to 'finish up' before escorting them from the premises.  This will also allow you, the librarian, some time to quickly assemble some suggested readings, including a collection of love poetry, the Kama Sutra, and an illustrated color atlas of sexually transmitted diseases.

Patrons, Dating

Librarians should always consider their clientele as a potential dating pool. You never know... occasionally one of your homeless patrons just might be desperate enough to be seen in public with you.

Love, Declaring your

Librarians should not embarrass themselves on Valentine's Day by declaring their love for the Fed-Ex delivery guy.