Katie,
My heart goes out to you. I don't know your age, but I have been in the cycle you mentioned for over forty years. I would buy some clothes to wear (just one outfit usually) and then guilt would come and I would purge everything. I am not exaggerating but I probably did this well over a hundred times. I would agree with everybody here. The desire doesn't go away. It may go underground, but it is still there. Katie, I wish I had faced up to this reality much earlier. Katie, thank you for sharing your struggles with us. There is a lot of understanding here.
Marsha