Article continues below advertisementSandra Bullock has been leaning heavily on what one insider describes as a "triumvirate" of Hollywood allies as she continues to navigate the grief that followed the death of her partner Bryan Randall, with friends stepping in to counter moments of despair and what sources say has become a deep reluctance to leave home.The 61-year-old actress' hermit-like retreat from public life began after Randall died at 57 in August 2023 following a private three-year battle with ALS.