I was never addicted,but I went through the whole menu that was available in my country when I was active,and we had plenty. Now the condition has "improved" and we cought up with the west (I'm in south-eastern Europe).
Pot addiction is not so serious
as an addiction,but it can be very dangerous for your mental health in extreme cases.I had this discussion in spirituality section,you can check me out.
Try this link from an organisation for legalisation:
Cannabis Use and Psychosis
For me, life with real spirituality (it can be any creative activity which uplifts, so it can also be labeld spiritual) is much better and fulfilling than those years of self destruction from which I learned a big lesson and turned them into a positive life capital.
As I like to say:
Free your mind-clean!