Yes, marijuana can be addictive. - National Institute on Drug Abuse for Teens  

Comprehensive information from the National Institute on Drug Abuse for Teens. https://teens.drugabuse.gov/drug-facts/marijuana  

Marijuana is the most commonly used illicit drug in the United States by teens as well as adults. Recent public discussions about medical marijuana and the public debate over the drug’s legal status is leading to a reduced perception of harm among young people. In addition, some teens believe marijuana cannot be harmful because it is “natural.”¹¹ But not all natural plant substances are good for you—tobacco, cocaine, and heroin also come from plants.