Lets dispel this belief once and for all: the notion of romantic love and romance (i.e. love) was not invented by the Romans; it appears to be an error borne from semantic confusion over the root term roman. That root term actually applies to several words that were not invented in Rome or by Romans, and which don’t apply to Roman behaviour whatsoever.

Romance as originally meaning “a story, written or recited, in verse, telling of the adventures of a knight, hero, etc.,” derived from the old Old French romanz meaning “verse narrative.” This reference of romance was applicable to narratives of adventurous heroes, but it was not applied specifically to the notion of love until much later; an application that would have nothing whatsoever to do with Rome or the Romans.

The literary sense of romance was extended by 1660s to individual love stories, and to the entire class of literature consisting of love stories and romantic fiction. Hence the phrase “Romantic Love” was invented, and later shortened to romance and romantic which had different meanings to the much older meaning of romance as a heroic adventure: it now meant a different kind of adventure whose motive was strictly aimed at love.

The New World Encyclopedia clarifies the matter as follows:

The English word “romance” developed from a vernacular dialect within the French language, meaning “verse narrative,” referring to the style of speech and writing, and artistic talents within elite classes. The word derives from the European medieval vernacular tales were usually about chivalric adventure, not combining with the theme of love (romantic love) until late into the seventeenth century.

Here are a few of the first English uses of the phrase:

1700:
“Many men being still of the opinion that the wonderful declaration of Spanish bravery and greatness in this lost century may be attributed very much to his carrying the jest too far, by not only ridiculing romantic love and errantry, but by laughing them also out of their honour and courage.” [The History of the Renown’d Don Quixote de la Mancha, 1700]

1720:
“And do you think, said his father changing his tone, I shall have the complacence to approve this romantic love of yours…” [A Select Collection of Novels: Don Carlos]

1737:
“Farewell, farewell forever. She left me, with how much concern upon my heart, as it was beyond what I ever felt, it is beyond what I can ever express. Tho’ I was assur’d her reproach was unjust, yet from the principles of affection that gave occasion to it, it affected me. I struggled long between romantic love and prudent conduct: one day I resolv’d to fling myself at her feet the next, and give a proof of my love by ruining myself in marriage ; but the next I thought it better to see her Father again, and strive if…” [The London Magazine; Or, Gentleman’s Monthly Intelligencer, 1737]

1741:
“But I think the tragedy may receive a wonderful force, should its authors, without minding that giddy Romantic Love which makes such havoc in their plays, follow only the true philosophic Ideas of antiquity.” [An historical and critical account of the theatres in Europe, Luigi Riccoboni – Printed for T. Waller, 1741]

1742:
“And where’s the diff’rence twixt old age,
and youth worn out in its first stage,
No longer to apologize,
ye husband’s aged, rich and wise,
Dread twice to court the nuptial state,
and from the sequel mark your fate,
Ye Quixotes in romantic love,
Platonic cuckoldom improve.”
[A Wife and No Wife: the Mad Gallant, an Humorous Tale of Lunacy, Love and Cuckoldom]

1749:
“This novel is altered from one published in the year 1762 The Author, perceiving many material defects in the original work, particularly that the story was too simple to be very interesting, too concise to admit of much exemplification of character, and too much in the usual strain of romantic love.” [The Monthly Review, Volume 53, Ralph Griffiths, George Edward Griffiths, 1749]

1761:
“There is no resisting the impetuosity of romantic love. Like enthusiasm it breaks through all the restraints of nature and custom and enables, as well as animates its votaries, to execute all its extravagant suggestions ” [The World – by Adam Fitz-Adam, by Edward Moore, publishe by R. and J Dodsley 1761]

1773:
“The adventures of the Spanish knight [Don Quixote] were written to expose the absurdities of romantic chivalry, so those of the English heroine were designed to ridicule romantic love, and to show the tendency that books of knight-errantry have to turn the heads of their female readers.” [The Critical Review, Or, Annals of Literature, Volume 35, W. Simpkin and R. Marshall, 1773]

1776:
“Reading books of extravagant poetry raises corresponding doubt’s in the mind as they paint all the passions immoderate. Tragedies, such as they frequently are; books of romantic love, and which is fifty times worse, books of romantic intrigues, all tend to disturb the breast of the tender fair one.” [The Lady’s Magazine; Or, Entertaining Companion for the Fair Sex, Appropriated Solely to Their Use and Amusement, Volume 7, G. Robinson, 1776]

1777:
“Romantic love seems to be almost peculiar to the latter ages. This passion may perhaps be traced up to that spirit of courtesy and adventure which arose from circumstances peculiar to feudal government, distinguished all the institutions of chivalry, gave birth and form to the old romance, and consequently to the new, and to this day influences in a perceptible degree the customs and matters of Europe.” [Essays on the Nature and Immutability of Truth, 1777]

1777:
“In this correspondence the two friends encourage each other in the [……] notions imaginable. They represent romantic love as the great important business of human life, and describe all the other concerns of it as too low and paltry to merit the attention of such elevated beings, and fit only to employ the daughter of the plodding vulgar.” [The Universal Magazine of Knowledge and Pleasure, Pub. for J. Hinton, 1777]

1787:
“The romantic love, peculiar to the ages of chivalry, was readily united with the high sentiments of military honour, and seem to have promoted each other.” [An Historical View of the English Government From the Settlement of the Saxons in Britain to the Accession of the House of Stewart]

1787:
“The customs of duelling, and the peculiar notions of honour,  which have so long prevailed in the modern nations of Europe, appear to have arisen from the same circumstances that produced feudal institutions: That same institution produced the romantic love and gallantry, by which the age of chivalry was no less distinguished…” [The Critical Review, Or, Annals of Literature, Volume 63, 1787]

1798:
“I readily grant that in former times this veneration for personal purity was carried to an extravagant height, and that several very ridiculous fancies and customs arose from this. Romantic love and chivalry are strong instances of the strange vagaries of our imagination, when carried along by this enthusiastic admiration for female purity; and so unnatural and forced, that they could only be temporary fashions. But I believe that, for all their ridicule, it would be a happy nation where this was the general creed and practice.” [Proofs of a Conspiracy against all the Religions and Governments of Europe, by John Robison, Philadelphia, 1798]

Romantic love was a continuation of courtly love conventions invented in the Middle Ages (as indicated in the above quotes), and which eventually became represented by an English phrase for behaviours that had long been been practiced among European peoples.

So with the above history in mind, let’s avoid the false associations with Rome and with Ovidian love which have no real connection with romantic love.

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Note: Romantic love (romance) also needs to be differentiated from unrelated social events such as romanticism and the Romantic period which arose in the 18th-19th centuries.