Before we begin it is important to understand the difference between ADDICTION & ABUSE.
In abuse, you tend to start using a certain substance (e.g., alcohol) or even adopt a behavioural tendency that is hard to stop (spending, gambling). However the frequency and intensity differs. In addiction, you tend to experience relapse meaning you have attempted to leave the substance or behavioural tendency but without much success.
You tend to experience withdrawal effects if you stop using the substance or doing the behaviour respectively.