The oldest surviving love poem is written in a clay tablet from the times of the Sumerians, inventors of writing around 3500 BD, and was called by archaeologists by a very un-romantic name: 'Istanbul #2461'. The author is unknown but is believed to have been recited by a bride of Sumerian King Shu-Sin, who ruled between 2037 and 2029 BC.
The following is the start of the poem:
Bridegroom, dear to my heart,
Goodly is your beauty, honeysweet,
Lion, dear to my heart,
Goodly is your beauty, honeysweet.