Skeet Ulrich addressed the fan theory that “Scream 1” Ghostfaces Billy Loomis played by Ulrich and Stu Macher played by Matthew Lillard are gay and in love with each other. “It’s not something that was intended or that was discussed in making it or creating the characters,” Ulrich, 55, exclusively told The Post while promoting his and Lillard’s latest collaboration. The actor added, “And I’m all here for it. No one can take it away from us.” In 1996’s horror favourite “Scream,” Ulrich and Lillar