I think therapy fulfills a need that I have, for connection, closeness, understanding, etc. Not having that need fulfilled feels bad, of course, but therapy doesn't create the need and may help me discover other ways to feel fulfilled (improving my other relationships, for example). Addiction to me is when something both fulfills a need and creates more need for that particular thing, the way doing opiates will make you crave more opiates. But I wouldn't generalize to others and some therapists might foster dependence in ways mine doesn't.

That said, if you feel unsure about your reasons for being in therapy or your progress, it's probably good to revisit those subjects.