Romance is ruled by Venus.
Neptune rules great Illusion.
The 5th house is the house of Romance, and I can vouch for it, having Saturn as its ruler in my natal chart. That never happens.
Yeah put Venus with Neptune and Mars in the 5th house, maybe the Sun too for extra "Feel Good" factor and I think you have yourself the very BEST ROMANANTIC configuration.
If you want
Romanticism... the late 18th Century Poetic movement, which has nothing to do with Love, but has a lot to do with the Philosophy of Emotion and Irrationalism in revolition against the Enlightenment, then Scorpio and Pisces are your signs, with maybe some Uranian revolutionary fervour thrown in. Neptune was in Scorpio with Pluto in Aquarius/Pisces. My kind of Romantic.