Marijuana is considered physiologically addictive.

From UpToDate:

In a national survey of 1527 cannabis users who reported at least three times per week use, the most common symptoms of withdrawal were sleep difficulty (14 percent), irritability or anger (14 percent), anxiety (13 percent), headache (12 percent), and depressed mood (11 percent). Other symptoms such as restlessness, decreased appetite or weight loss, abdominal pain, shaking or tremors, sweating, and fever or chills have been described.