Nosey/suffocating close friend?

I would tell her, on the day that you aren't doing anything that you don't feel well, and that you want to sleep, so would appreciate no distractions. Ask her to leave you alone and to go hang out with your other friends. She will obviously contact you after that day, so just tell her that you are at work (even if you aren't) If she knows you REALLY aren't at work, than tell her that your boss needed you to help her with something, but that's all you can say. I hope I helped!