I get like that sometimes, when I just stop talking to people. I won't even have a regular small talk conversation with my family members - just walk right past them. They'll ask me what's wrong and I'll mumble at them and leave. It doesn't feel good but it happens naturally when I really get fed up with everyone. I'll know in the back of my mind that it's not good to be that way but I won't do anything about it. I love people. I really do. Most of my life revolves around them. So when I get stuck like that I don't feel like myself anymore.
It describes my feelings perfectly. I feel like some important aspect of me has died due to severe social depravation. I can feel this mostly when looking at the discrepancy between me and people who are social (like most everyone else). They are cheery, vibrant, and alive. I'm not automatically that way.