I don't know if this would be considered "romantic" but I used to do little things like make my ex breakfast in bed and rub his back until he fell asleep when he had nightmares. I wrote one boyfriend a poem in high school
As far as romantic things that were done for me, there were different experiences with different guys. My first boyfriend back in high school took me to a candlelit dinner at an italian restaurant for Valentines day; that was my first real date like that so that was special to me. My second boyfriend took me on a picnic and also another memorable date was walking through downtown Charleston with all the Christmas lights around and just hanging out together. Third boyfriend and I used to go for walks on the beach at night. The last boyfriend I had did a whole bunch of crap (getting me roses for every month we were together, getting me jewelry and presents randomly for no reason, taking me to fancy restaurants, making meals for me, surprising me on Valentine's day with a big balloon and flowers and a bear and taking me out to dinner, walking on the beach, proposing on the beach, etc) ................. but all that stuff kind of lost its meaning since he also turned out to be abusive and said and did things that certainly canceled all the sweet things out.
I'm older now and I don't really care if I get roses and presents or go on expensive dates. I'm more interested in spending time together and enjoying each other's company.
Little things mean a lot.