younger people

Today I had to deal with a younger person and even though I deal with all kinds of people over and over again everywhere, today this kind acted really immature. I didn't think she was as immature as she acted at that moment, and I don't even know how to handle it. I did it the best way I could and moved on, but it bugged me.

Why is it that people piss other people off? Why is it that it bothers me when people are idiots? I always remind myself that tomorrow is another day. Today is not the end all and be all, but then I eventually let it go and move on, but this was bothering me. I don't know why, but I've not dealt with immaturity like that since my brother was locked up years ago.