For flowers, the best choice would be to settle for roses that are of pure red. You can spread out these flowers as center pieces or decorations along the aisles of the church where the wedding ceremony would take place. You can also have the wedding cake designed as a heart and the souvenirs can also take form in this shape. This is because nothing else can describe Valentines best but through the shape of hearts and maybe some designs of cupid around. You can implement the image of cupid in your invitations in between both of your names with a heart and an arrow.