Same here. I have a hard time resisting the urge to isolate myself when I'm depressed. I'm getting better about it though, at least I recognize that I'd be better off finding someone to hang out with than stick to my room and go online. I still isolate though, mainly when the idea of being social feels too overwhelming for me.

EDIT: I should add that maybe I need to recognize that it's only the idea of being social that feels overwhelming, and that socializing will help me feel better, since it usually does.