Unreliable

I have an unreliable friendgirl. I know, it sounds like an oxymoron that a girl could be unreliable but I put it down to her youth :) Anyway, many times we have agreed to go out when I get an sms like half an hour before we're supposed to meet that she cannot make it. Doesn't want to, too tired, or elsewhere busy. It has happened many times. So since we had a lose agreement to meet up tonight I sent her an email saying something like are we meeting this evening? Yes apparently. She's even booked a table for several people but forgot to tell me. Perhaps she just assumed I'd be there :)?? Gosh, I'm feeling predictable...