After some waiting and reading (the whole paper) they don't appear to be coming and aren't answering your calls.
How long would you wait for someone you've made concrete plans with?
I was supposed to meet mentioned "friend" at 10:30am and waited for over an hour before going home. She just called me and said "My bad I thought we were meeting around 10:30." Since when is over an hour late around 10:30? Luckily for her I had reading material or I would have been really pissed. I know I'm not doing anything today, but still.