Romance... a topic most people wouldn't expect me to comment on but yeah, even I do have a romantic side to me.
For me, romance is when you are able to be with someone and you would love to always be with that person. You don't necessarily have to do anything when being that person, simply sitting next to eachother, not looking at eachother or even talking is fine and can be romantic as long as the requirement of wanting to be with that person in that moment is given. The most interesting romance for me is between two people just being together and enjoying something without necessarily interacting with eachother because they are happy simply because they can be together with that special person. That moment when words are meaningless and emotions fill the room making you feel completely at ease, that is romance for me, not love, simply this feeling that nothing in the world matters as long as you can remain in this situation.
I remember that one time when I was standing on a bridge with one of my closer friends (when we were still friends) just staring down the river without saying a word. This was probably one of the most precious moments in my life and most valuable one I can imagine to this day.
In a way you can consider these moments of being apart with your loved ones another way of romance, sort of a building romance which will reach it's climax at their reunion, giving a smile to both of them.