I don't think this is a social disorder per se, but I was wondering what other people thought of it and who could relate, or whether it perhaps is related to some disorder or something.

Most of you will probably be familiar with hanging out with a group of people socially, especially at a pub, bar or restaurant etc. One thing you'll probably notice about the other people is that they'll engage in convo, be focused on the discussion in the group, be laughing/having fun, focused on the immediate situation etc. On the other hand, I always seem to be the one who's sitting there, looking around the room, thinking about other things. If I make a joke I'll often analyse it in my head to determine whether it will be worth saying beforehand.

Simply put, half the time I'm out somewhere with a friend I'll be off in my head or "analysing" other people in the immediate vicinity, thinking about what they're doing etc. Don't get me wrong, I do enjoy socialising at times and it's not because I'm bored, it just seems to be my default position to revert to thinking about things whenever someone isn't otherwise directly engaging me in conversation. I often think about what I could be doing at home, what I could be learning, what I should be doing for university etc. At other times I'm thinking about my body language, how I'm sitting (or walking), how I will be perceived etc. In a sense I'm purposeful about things I do socially, as though they have to go through a filter before I allow them to transpire physically.

Does this sound familiar to anyone, is it weird behaviour or a disorder or something, or perfectly reasonable and common to normal people? Just curious.

Thanks.