welcome to pc. i'm glad u found us.
weed is psycholigically addictive. while one doesn't suffer withdrawal from it doesn't qualify one for not being dependent on it. cocaine use is just another example. in that case chasing the "high". ecstasy is another high.
there's a saying-"if you use to gain a feeling or use to get rid of a feeling, there's a problem."
so i pose this question to you-are you not naturally happy or do you need to create a mood or escape a mood by using?

ecstasy tolerance and dependance
from addictionsearch.com
"MDMA is an addictive drug and can cause both physical and psychological dependence. Besides the side effects, the drug has severe social, behavioral and health consequences. As to who and when someone becomes addicted remains unknown. Even though long term use of MDMA is known to cause addiction, it is very likely that even short term use may cause partial dependence. There is no doubt that when Ecstasy is used for longer duration and in high doses, tolerance does occur over time. Unfortunately the tolerance is only to the pleasant hallucinogenic effects of the drug and not to the unpleasant side effects which increase in severity with an increase in dose.

Ecstasy can rapidly cause dependence and most individuals complain that they have a difficult time stopping the drug. Because the pleasant effects of Ecstasy diminish with time, most users tend not to use it for prolonged period. However, the addictive nature of the drug makes stopping the drug difficult and the vicious cycle of dependence continues."