This is quite bizarre and rather childish but one of my work colleagues isn't talking to me.

We had an argument yesterday after I snapped at her over something. In fairness what I snapped at her over wasn't really her fault but, given she's an unpleasant aggressive and selfish bully I can't say I feel hugely guilty over it.

But in any case, she's actually not talking me at all. I mean I've not gone out my way to speak to her today when not necessary (and as such haven't spoken to her today) but she's actually avoiding speaking when necessary (to the point of emailing me to tell me she's gone to lunch despite the fact she has to walk past my desk to go to lunch!)

Why are people so childish?