I should have provided proof.
Study proving that ganja IS NOT addictive:
Preliminary Estimates from the 1993 National Household Survey on Drug Abuse, Rockville, MD: U.S. Department of Health and Human Services (1994).
It says that among Americans age 12 and over, about 34% had used ganja sometime in their life, but only 9% had used it in the past year, 4.3% in the past month, and 2.8% in the past week. That proves its not addictive. Because if it was addictive, the 'past year', 'past month' and 'past week' figures would be much higher.
I also suggest you do some research on ganja. Its not possible to overdose on ganja.