A couple of us were having this discussion tonight. One nurses says no it is not addictive. I said "well I've know some potheads who couldn't stop smoking, couldn't face life without pot, etc." Sounds like an addict to me.
She says it's not been proven to be physically addictive.
Actually, I'm of the belief anything can be addictive, especially if it's mood altering, or even endorphin raising.