here, ive done a shitload, and i mean a fucking shitload, of research on this. im 16 and i spend about 1 1/2 hours a day looking at this, i dunno why lol
but some studies that i trust have said that in major major doses, marijuana can become slightly addictive. oh, and you just may have an addictive personality, in which it is easy to get addicted to something, like caffeine, chocolate, sex, or the internet.