Read through classic literary poets who have written love poems. William Shakspeare, in addition to the famous Sonnets 116 and 18, also wrote "O Mistress Mine" and Sonnets 29, 44 and 55, all of which describe true love. Familiarize yourself with poets Andrew Marvell, Christopher Marlowe, John Donne, Emily Dickinson, Elizabeth Barrett Browning and Christina Rosetti, who all wrote a variety of passionate love poems.
Browse the poetry section at a bookstore or library. Some bookstores may organize poetry according to a theme or genre, such as "romance poetry," but often writers write on several different themes in one anthology of poetry.
Sign out or buy some literary or poetry anthologies at a library or bookstore. See if the contents page is organized by of theme; it may include a section on love poems. Otherwise, check the index at the back of the book and look up poems associated with the keywords "love," "romance," "relationship" or "marriage."
Type the keywords "true love poem" or the name of a romance poet into a free Internet literature database, such as Project Gutenberg, the Electronic Literature Directory or The Literature Network.
Attend poetry readings or clubs in your area. Check libraries or shop windows for flyers advertising readings or meetings. People who attend these meetings are often familiar with poetry and may be able to suggest some ideas. Buy a copy of a poet's book containing love poetry you heard at a reading. Poets will often have a stand set up outside the auditorium or hall where the reading takes place.