Addiction is a chronic, treatable medical illness that involves complex interactions between brain circuits, genetics, the environment and a person's life experiences. People with addiction use substances or engage in behaviors that become compulsive and often continue despite harmful consequences. The constant desire to use a drug is an example of addiction.
In any case, there is substantial evidence that addiction is related to loss of frontal lobe function and increased impulsivity. The limbic system isn't the only part of the brain affected by long-term drug or alcohol abuse.
It speaks to the power of addiction that when a person is knocked down by an alcohol or substance abuse disorder, their core identity is lost, subsumed or consumed, and replaced by another identity, that of an addict. The addicted individual reconstructs an identity that serves and meets all the demands and needs of addiction.
Counseling is one of the pillars of substance use disorder treatment for many people. Cognitive behavioral therapy, family counseling, and other types of therapy can help you stay clean.