From my experiences I think less about cocaine then I did 6 months ago (8 months clean) as I am getting my life together and trying to fill it with activities.
I mainly only think about cocaine whe I am on my own or see a reference to it in the media - these thoughts are sometimes about enjoying the drug or towards the end of my using where it was not fun.
I doubt it will ever stop thinking about it from time to time but I have no desire to use