Decorations: In addition to flowers, other popular Valentine wedding decorations include candles, ribbons, and lace. Scatter heart shaped confetti on wedding tables, or use colored marbles to fill vases for floral arrangements. Lace runners can add romance and delicacy to buffet tables, and heart shaped balloons can be a whimsical and fun touch for an entrance arch.
Menu: A romance themed wedding menu can be any foods you enjoy, but popular choices include rich gourmet entrees and aphrodisiac appetizers such as chocolate covered strawberries or an oyster bar. Rich hot cocoa is also a treat for this winter wedding holiday. Champagne is essential for the toast, but for a romantic touch, choose pink champagne.
Wedding Cake: A Valentine wedding cake should be rich and elegant. White chocolate and red velvet are popular choices, as are decadent chocolate cakes with strawberry or raspberry fillings. The cake can be heart shaped, or may be decorated with roses or fondant lace.
Wedding Favors: Give your guests a touch of romance with Valentine themed wedding favors. Many different wedding favors, from bells and frames to ice cream scoops and candies, come in heart shapes perfect for Valentine favors. For more unique choices, opt for wedding truffles in your favorite flavor or rose scented candles with custom labels, adding a whimsical elementary school style Valentine as the wedding favor tag to each one.
Music: The music at a wedding is always romantic, but amp up the romance for your music by choosing only love songs for weddings to play during your reception, or create a playlist of songs that all feature “Love” in the title.
(Source: http://www.vogueweddingblog.com/tag/valentine-theme-wedding/)