Yes, I get this and have had this. It seems to cause a loss of self assurance and confidence and makes you feel really isolated and alone, even around other people. And on top of that, the paranoic thoughts of "do they really like me...why are they being distant all of a sudden?" etc etc.

I am very much that way since the poisoning. I remember how I was before it and I made friends much easier and kept them. Since this? I'm just not stable like I was, and the sickness has made me rather boring and dead, like the personality is not there as it was.

I've learned mainly to be around my own company. It's a relief to know I'm not alone with this though, you really start to feel like a nobody.