What's the longest you've spent time alone? Like with little-to-no contact with other people.

For me it was 2yrs (and then some), I only went out for groceries and occasionally for a friend/family event that my mother dragged me too. Now, the longest time i'll spend indoors is around 3 months. I've been trying to go out at least once every Saturday but i can't always bring myself to leave my home.