Everybody else will act normal and all prior evidence of their existence will also persist like normal.
I guess for most people it would be pretty much immediately if their significant other isn’t there in the morning and for some fringe isolated cases it might take forever.
I guess best case for me would be around 4 hours on a work day during lunch break seeing a big crowd of people when it would finally click.
Worst case would be probably 5 days when I’m mostly working from home office.
No SO, but I’m trying. Since “people”, I’ll see my dog, that part is normal. I’ll be quite worried and anxious if the psychologist I’m talking to would suddenly become out of contact, especially when it’s usual weekday and time.
I’ll definitely become agitated and will run around looking for my mom.
I’ll be scared for every girl I’ve cared about who won’t be online since a certain moment.
But due to self-gaslighting, I’ll likely wait for a few days before assuming that things are very wrong.