No man, youre not. If it was you doing it to her, id be a big deal. If youre gonna flake, you better call me at least the morning of.. and for another person?!? Unless theyre in from out of town or its your grandma, its non excusable. Especially if its for a boy.. bros before hoes all the way!!! Its a rule for the dick, i will hang with my best friend over him. and I expect the same in return. get mad and let her know its not cool, otherwise it will happen again.