Yeah, I do that a lot. I'm a pretty solitary person by nature but even more so when depressed. It's a combination of reasons I think. A need to be alone but also a lack of energy to interact with other people. I also just get really tired of trying to convey how I'm doing, and besides I don't think anyone cares and they'll just get sick of my bs if they aren't already. Even my wife gets annoyed with the mood episodes and I don't think people who haven't experienced it truly believe that it's out of my control. I don't believe they truly care no matter how much they pretend they do. Everyone's too caught up in their own crap. The only person I really talk to is my therapist, but she probably doesn't really care either, she's just paid to pretend. When I do try to talk to someone else and I can see that uncomprehending look, it's worse than not saying anything at all.