Many people have what we call in the treatment world, functional addictions. It means that they definitely have an issue with their substance use but are able to maintain a semblance of a life. Even functional substance users, however, suffer from the consequences of addiction; usually in their relationships, job performance, and mental/physical health. They often think that because they aren't as bad as other users they see, that they are okay. This is furthest from the truth.
Addiction is a progressive and chronic issue. This means that it normally only produces more severe consequences and becomes harder to manage and recover from over time. It also means that for a lot of people, it won't go away on it's own. You don't have to wait until you "hit bottom" (as the old adage goes) to seek help. Therapy can help you to prevent more severe consequences down the road that can lead to the loss of your job, family, or even your life.