confuddled,
I felt like you do last year before I started taking anti-depressants. I felt that no-one knew how I felt, that I had no-one to talk to, and everyone irritated me. I couldn't even tolerate being in chat here, because I wasn't patient with others and could not express myself. Throughout the past year, I've been in therapy, taken meds, then taken different ones.
The point of this is that there is an answer for you. Don't give up, keep on searching. Others do know how you feel, and PC is a great place to start. Consider talking to a therapist or someone else you trust, even if trust is hard for you right now. Good luck - I wish you all the best. If you ever need someone to talk to, send me a message.
slow