love: crazy-flashy or calm and steady

Just caught the very tail end of The Shopworn Angel on TCM, (it being Hattie McDaniel movie day on TCM) which had a very young Jimmy Stewart.  The interesting thing in the movie about the romance was that the female lead and the other male lead didn't realize they were in love until Stewart's character fell in love with the female lead.  It was quite the theme in the movie, and seemed very much in tune with the time that the movie was made, although still something that might happen today.  Sometimes love isn't crazy-flashy, but calm and steady.