So further research led me to the following:
"Drug addiction has two components: physical dependency, and psychological dependency. Physical dependency occurs when a drug has been used habitually and the body has become accustomed to its effects. The person must then continue to use the drug in order to feel normal, or its absence will trigger the symptoms of withdrawal."
When I described the brain's adaptation to increase neurotransmitter levels I was describing physical dependancy.
Also:
"Psychological dependency occurs when a drug has been used habitually and the mind has become emotionally reliant of its effects, either to elicit pleasure or relieve pain, and does not feel capable of functioning without it. Its absence produces intense cravings, which are often brought on or magnified by stress. A dependent person may have either aspects of dependency, but often has both."
I also described phsychological dependancy. In conclusion, cocaine elicits both aspects of dependancy and therefore, you are wrong in saying that there is NO physical dependancy.
http://en.wikipedia.org/wiki/Drug_addiction