if she's your close friend, she must be very upset/pissed off/hurt/angry with you to ignore you completely*~ I think since you've tried to talk to her, call her, email her, and she's not responding...You need to let her know that you will give her the time and space she needs, and let her know you're there IF and WHEN she wants to talk with you~* I dont know what your argument was about...but it must have been pretty 'deep*
GoodLUck*