you don't need to be insulting. Here is a definition of drug addiction.
Drug addiction is a pathological or abnormal condition which arises due to frequent drug use. The disorder of addiction involves the progression of acute drug use to the development of drug-seeking behavior, the vulnerability to relapse, and the decreased, slowed ability to respond to naturally rewarding stimuli. The Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) has categorized three stages of addiction: preoccupation/anticipation, binge/intoxication, and withdrawal/negative affect. These stages are characterized, respectively, everywhere by constant cravings and preoccupation with obtaining the substance; using more of the substance than necessary to experience the intoxicating effects; and experiencing tolerance, withdrawal symptoms, and decreased motivation for normal life activities.[2] By the American Society of Addiction Medicine definition, drug addiction differs from drug dependence and drug tolerance.[3]
It is a pathological or abnormal condition. Love is not a pathological or abnormal condition. It is OK to say that a person in love acts LIKE a drug addict, but that is not same as BEING a drug addict. That is why we have so many words, so that people can use them precisely.
