try and keep busy, and AVOID THIS FRIEND AT ALL COSTS.
give her any excuse it doesnt matter, just dont think throwing it all away will be worth sparing her feelings.
if you get the urge, go for a walk, or call up a friend or relative, or go to the movies or anything that isnt just you sitting in the house.
try and spend time around people (obviously not users and dealers)
if you find that its just before you go to bed you want it the most, it might be worth going to the dr and asking for sleeping pills.
i hope that helped
Love,
Max x