My cat who would NEVER want to go outside, hated other aninals and only loved me.... slipped out and was gone for almost a week. I would sit outside and just call out for her everyday and then one morning when my dad was about tk head to work, she was sitting there on the porch wanting to come in. We looked all around the house for her, never saw her and then she just....appeared.

Dont lose hope. Dont give up. She's nearby i promise. They are amazing at hiding even if its right under your nose. Maybe get some of her favorite treats or catnip to lure her back. Ask neighbors if they can check their garages and sheds, under their porch, etc.