It's over for Jillian Michaels and Heidi Rhoades—and apparently, it has been for a while. Speaking directly to her "tribe" Friday, the fitness guru revealed her engagement to Rhoades, a music manager, has been called off. "You've been with me through it all so I'm sharing some news with you...Heidi and I have been split for a while now," Michaels wrote on Instagram. "We've found we're better friends and parents living apart than staying together. Life and people change but our love for one another and commitment to raising our two kids as an inseparable team remains. Thanks for always loving and supporting us, the feeling is mutual!" Rhoades has not commented on the...