What if your friend made up storry that she want to see you on sun?
You ll be thinking it s her not showing up,and ur friend will have a little laugh at you.
I ve no idea how good friends are u,but it s just a suggestion.....
Otherwise if she did not showed up,seems she found something more 'important' to do,dont let anyone make anything more important than yourself,and if they do,u don't really need them....
And there s a third chance-she might of felll sick or something....
I m still lurking sometimes ;-)