You are in Women, Men, Aging . If everyone you know will wear black to a gathering, choose another color. Devote time to doing anything you excel at, whether it be playing sports, gardening, or throwing parties.
Confidence is seductive.
Laugh a lot. Give nonsexual compliments. Dance, swim, take a walk, eat an ice cream sundae. Enjoying your body is incredibly sexy. Instead of trying to attract someone, concentrate on being an interesting person.