Weed can be psychologically addictive but not physically addictive -- that is, you won't suffer any physical withdrawal symptoms from quitting weed
like you might from other drugs, such as Lorcet. If weed
is making you feel like ****, now is a great time to get off the stuff. I have no moral or philosophical problem with weed, and I indulge in it occasionally myself, but I know it can be harmful to the lungs, esp. in the amounts you're using.