I don't know if this is considered romantic, but when I was at a friend's party, my friend told me he liked me when we were alone. For the rest of the night, we were hanging out and enjoying each other's company because.. I liked him, too (=
My most romantic moment was, oddly enough, completely platonic. My closest friend at the time visited with me at my inicial town. We had a great día at the beach, and took a carriage ride thru historic Philly. If we had been a "couple", it would have been perfect.