Who is the goddess associated to Valentine's Day?

Most likely Aphrodite, the goddess of love. February 14 is Valentine's Day, the day of lovers.

Lupa might be a closer match. the Roman holiday of Lupercalia was held in honor of the wolf mother who suckled Remus and Romulas (ok I know I cant spell worth a hoot sorry y'all). it was a festival of love and wildness usually held on the 15th of

February