if the drug helps you cope with things going on in your life and is the only way to cope with them you might as well be addicted. You can physically stop but mentally now coping with life becomes harder. It's like a crutch. Also, anecdotally all people are addicted to something to one degree or another. Some of these addictions are socially acceptable - some are not. Usually when you "quit" what happens is that you replace an addiction with another.