The phrase "a bit of a romantic" is an idiomatic expression used to describe someone who has a tendency towards being sentimental, idealistic or expressive about love and relationships. Full definition
I love different shades of gray together, it gives off such and effortless, quite sophistication with a little bit of romantic at the same time. (looplooks.net)
Very energetic, plays basketball and work out, loves being outdoors, bit of a romantic etc etc etc... (sugarmommaclub.com)
I love action movies but also a little bit of romantic settings such as music, movies books. (armydatingservice.com)