Not really. You can become what they call "psychologically addicted". Which basically means you don't want to stop because you enjoy it, and when you're not high maybe you wish you were. But this is not the same as being phsyically addicted to caffeine, nicotine, alcohol or any other truely addictive substance. You can become psychologically addicted to pretty much anything that changes your state of mind in even an obscure way (excercise, food, or even doing math...).