Love poems have been an integral part of any literature, whether it is Western or Oriental. In fact, some of the best literature is related to love. Love is all pervasive and cannot be confined to any particular race or community. Hence, love poems have existed since ancient times.
To testify this, we all are aware that even in the history of English Literature, there was a particular period when "romantic poems" were in vogue and "romantic poetry" was the talk of the town. To name a few exemplary romantic poets from England: Keats, Shelley, Wordsworth, Byron and Blake. Their poems are masterpieces and treasured by posterity.
Love has the power to change an ordinary person into a genuine poet, thereby encouraging him to write delightful love poems. Normally, the language of a love poem is simply flattering, and sometimes exaggerated, too.
Sometimes, a lot of negative thoughts tend to creep in a love poem if the poet is suffering due to lost love or unfulfilled love. Such poems reflect his shattered dreams, agony, and frustration.
Love is an eternal feeling- so expect love poems to reflect the changing times even though love remains the core theme always.