Valentine's Day is touted as a day of romance and tender feelings, but that's not everybody's idea of love. Some people feel a descent into the realm of horror, madness and nightmares is what love is all about (we call them "married people"). Famed haunted house the Darkness (1525 South Eighth Street; www.scarefest.com) is newly renovated, and it will be open tonight for My Bloody Valentine's, the perfect day for those who can only say "I love you" while screaming. Terror Visions 3D and Zombie Laser Tag are part of the deal, but only the first 500 people will be allowed entry. My Bloody Valentine's runs from 7 to 11 p.m., and tickets are $25.