That's the reason I do one long break from weed atleast once a year, and first time in my life since I started i'm just at the end of my 2 months break ;D I always say that weed isn't narcotic because you can abuse alcohol, abusing alcohol is deadly, you can abuse amphetamine and amphetamine abuse is deadly, you can abuse weed but its not deadly however some of my friends smoke everyday for over 5 years and when that happens you're seriously addicted to it like can't sleep and are distracted and you feel bored of everything. I always do a detox when I go on holiday, in opposition to most people taking fkton of weed for holiday xd.