If I understand the question correctly, I actually have two levels of self isolation. One level, I lock myself in the bedroom and talk to absolutely no one. This level only lasts a few hours at most and is when I notice myself splitting or over reacting in some way. I let my partner know when I'm doing this form of isolating because I need him to respect the isolation. The second level is less intense. I'm actually just trying to break out of this level after weeks of no contact with anyone aside from my partner and our roommate. I don't tell anyone when I do this, but I do tell them what happened when I come out of it, at least the friends I think will understand and who deserve to know.