Its usually due to nobody wanting to form groups with me, if we do something I'm usually just sitting at the back of the class by myself. every year I get picked on aswell, but it doesn't go to the point where I'd call it bullying. I've had some people attempt to become friends with me, but I end up just brushing them away and regretting it later. I guess I just get easily flustered whenever someone tries to talk to me.

edit: could I also ask for help about something in PM? I'd rather talk about it in private.