[Starseeker]

Hello everyone.
So I started high school today. I had changed schools only once before - from primary to junior high. I thought it would be better this time because I'm three years older and, theoretically, more sociable. But now as I can see I'm feeling similar, I don't want to go through it all again.
The thing is, my new classmates seem very friendly and stuff. Almost everyone is willing to talk to me. Our headteacher was smiling and looked as if she likes her job.
And that is my question - what was wrong? After formal schoolyear inauguration a few smaller groups in my class formed. They wanted to go somewhere to eat. I wanted to go home but I stayed a bit before they left not to seem rude/closed (wow what an accomplishment). Then I made an excuse that I have to go and went home. I was on the verge of crying all my way back, fortunately I made it home before I burst into tears completely. I don't understand this. While others seem to consider meeting and going somewhere together fun, I just want to be left alone. It was too much for me. Why am I so closed and why can't spending time with them be pleasurable for me? Especially that they're so friendly etc...
Sue