You are not an addict. you may have fallen into a pattern, but speaking as someone who has had addictions to coke and smack, Cannabis is not addictive. sure you can feel like you need it when you haven't got any, you might be a bit grumpy and slam a few doors, and say "For fucks sake" quite a lot, in fact you may well be a right bastard to live with for a few days, but addiction it aint.
I dunno, I'd say being unable to sleep more than 3 hours a night without it is a physical addiction