reverse homesickness

I don't really understand where this feeling comes from, but it feels like I'm suffering from some sort of reversed homesickness..
I've met a lot of people recently, both older friends and new people.
Maybe that's why..
But there's something else as well..
I still have this nagging feeling about being at the wrong place.
Like I'm supposed to do something right now, instead of being here.
There's strings going through my body and they're tearing me in different directions.
I can't define the feeling any more than this thought.. it's like there's this massive wall blocking out everything apart from this messed up confusion.

But I really need to clear my head from this, because I have an exam tomorrow and I can't afford messing things up.

It's at these times I wished I had someone I could speak about these matters with, without feeling like a total...idiot, for lack of other words.
It's not that I don't trust my friends, because I do. The thing is that I don't talk about these kind of things with other people. I never have. I don't open up that easily that people think I do.
It would never occur to me to be dishonest, but neither can I express myself properly.

I simply don't know how to do it. I don't understand how to do it. Without feeling uncomfortable...without forcing it.

It's strange how I don't mind listening to other people, about their lives and feelings, but when it comes to my own thoughts.. I freeze...