We have a couple places for your celebration to recommend

Valentine's day @ JW Marriott Bangkok
--At Marriott Cafe, they offer a buffet menu for 1,800 Baht/person. Featuring menus will include Seared Akami Tuna, Grilled Australian Beef Medallion on Tomato Confit, Pan Seared Foie Gras and Valentine's Desserts.
--At Tsu Japanese Restaurant, they offer a set menu for 2,200 Baht/person.
--At Nami Japanese Restaurant, a special Teppanyaki set menu for 1,800 Baht/person is recommended.
For more information on Valentine's special programs and reservation, call 02 656-7700

Valentine's day @ Sheraton Grande Sukhhumvit
--At Rossini', they offer five-course menu prepared specially for the evening 2,400 Baht ++/ per person.
--The Sala, Barbecue menus are featuring on this special day.1,800 baht ++ per person
For more information on Valentine's special offers and reservation, call 02 649-8888

Valentine's day @ Millennium Hilton Bangkok
--Three Sixty offers a three-course candlelit meal. You will enjoy piano music in the background and Chaopraya river view. 6,900 ++ Baht per couple.
--At Flow, a river side restaurant, they offer a buffet menu with free of your special night photo. Welcoming and farewell gifts are included. 4,900 ++ Baht per couple.
For more information on Valentine's day and reservation, call 02 442-2000