The main sign of addiction is being unable to stop. Absolutely not when doing so puts your health at jeopardy. No, not when it creates financial, emotional, and other kinds of difficulties for you or the people you care about. Even if you wish to stop using drugs, you can find that the need to get and use them consumes every waking moment of the day.
In addition, physical dependency and tolerance are not the same thing as addiction. If you suddenly quit using a drug after developing a physical dependent on it, you may experience withdrawal symptoms. A state of tolerance develops when a given dose of a drug loses some of its efficacy over time.
For example, if you use opioids often to treat pain, you could build up a tolerance to them and even become physically dependent on them. This doesn't mean that you have a problem with being dependent on things. In most cases, only a tiny fraction of people will develop an addiction to opioids even when they are administered appropriately and under the supervision of a physician.