I have very low tolerance for frustration, and I switch between mental states in a blink of an eye, not gradually like most people. I cannot handle my emotions very well. They are overwhelming. It's always been like this for me. Every time I think maybe now I'm better and strong (which was the case for the last 3-4 days), a small setback throws me 100 steps backward. No wonder why I prefer to be alone and keep quiet and avoid interacting with others in general. What seems normal to others, I take it as offensive and frustrating.