If you ask me, nothing says "I love you" more than a flower with a people stamen (see below). Sooo much love on one card - I can hardly stand it! This one was produced by a company called Gallant, from their Wood Winds collection.
This second card is from good old American Greetings. The photo is die cut cardboard. Inside, it says:
Where you are
there are soft steps
and gentle hands
there is singing, tenderness,
a comforting word,
a happy whisper
Where you are
there is all the peace,
joy and contentment
a man could ever hope for
Where you are
there I will be forever!
Happy Valentine's Day, Sweetheart
These certainly convey a different era. But love is love, after all - nothing can change that.