It's been a long day and you're stressed out. The job is harder than you'd expected, your boss is on your butt about everything and you're feeling in over your head. I really do get it.
This does not mean you can be rude or bossy to me. So please think before you speak because next time my response won't be, "oh, ok, sure not a problem". Next time I will kung fu your butt and sneakily delete all future meetings from your calendar. Take that!