You can never go back to how things were, even if you wanted to. I went into my old work today for a few odds and ends and saw a ton of people I worked with. I was there for 5 years so we knew each other pretty well. I wasn't some bum off the street, but that's how it felt. All I got was a cursory glance and smile, the obligatory hello and standard small talk. It's frustrating to feel so out of it and less important than you once were. I walked into my home and didn't know anyone there.