It's more the thought of having to do it. Most of the time, i get there, i chat to someone, and it's fine.
On a few occasions, someone who's been friendly with me for weeks/months, doesn't want to talk to me for a while, and then they are friendly with me a few months later.
I end up thinking "have i offended this person?" or "is there something going on in their personal life?"
At work and socially i never had this problem. I tended to just get on with everyone.
So do other people experience this confused feeling of "why is so and so being a bit off with me?" in the school playground ?