You will become dependent on suboxone. I wouldn't say it is 'addictive' the way our drugs of choice are. By that, I mean, in my experience, I don't crave the sub, I don't get high off of it, I don't have cravings for my DOC, I don't want to get high, and using doesn't consume my every thought anymore.
I will say this: If you are seriously considering Suboxone therapy, find a reputable psychiatrist who is an addiction specialist.