Don't let anyone tell you otherwise. Pot is addicting. There are people in my rehab now who are addicted to pot, and I've seen how hard it is for them to come off it. Do what you know you need to do, to get and stay clean, and ultimately you'll feel a lot better for it.
As for NA - most of the groups up around where I am, don't distinguish among drugs, they say a drug is a drug, and in sharing encourage members to say "Substance of choice".
Good luck & stay strong.
splitimage
__________________
"I danced in the morning when the world was begun. I danced in the moon and the stars and the sun". From my favourite hymn.
"If you see the wonder in a fairy tale, you can take the future even if you fail." Abba