My Geeky Valentine's Day Card

#include <stdio.h>

void main (void)
    {
    while (1)
        printf("I love you! ");
    }

I came up with this after having sat through a few weeks of lectures involving polar coordinates, conveniently scheduled in January.

r = 2*cos(pi/2 + t) + 2

Run that through gnuplot with 'set polar' and see what you get. :P