Physical Dependence vs. addiction

Is there a difference between physical dependence on a medication and addiction?  I've been on 4 mg of xanex for 20 years for agoraphobia.  Am I addicted or just physically dependent?

[Roger Gould, M.D.]

If you are physically dependent, it only means that you will have some sort of somatic reaction when you stop using it.  If you are addicted, it means you not only anticipate a physcial reaction, you mentally don't want to stop the medication because you don't think you can emotionally survive without it.   Also, if addicted in a dangerous way, you have increased the dose to a level that interferes with your judgement and day to day functioning, and are getting a high from the medications.  that's the info, so you can decide..