How long will I crave cigarettes?

I quit smoking 7 days ago cold turkey, the cravings aren't so bad now, was a little full on earlier but I put my head down and smashed it out... I only smoked for 4-5 years anywhere from 25-35 smokes per day when I quit, I'm wondering how long will I crave cigarettes for? People tell me forever but I refuse to beleive something will control me forever, help?