Your question here is a bit confusing.  "is this close to him leaving us?"  I am a female 46 year old female, diagnosed in 2007 with M.S. I know that I started having symptoms ten years prior to being diagnosed when I was about 36: dropping things, confusion, fatigue, dizzy, migraines~etc.  The lesions were confirmed in many MRI's with contrast and then in a spinal tap with conological bands.  One of the major signs for me was vitigo which feels like things are in fact "moving" which it sounds like what your father is describing.  There is medication that can be given to him to help him with this if he is able to take this and if he has health insurance.  None of us will now when our last hour will be here on this earth so it is hard to say in answer to your question if your father is leaving you as a sign that he might be in one of the past stages of dying. His doctor should give you a better idea of that.  In my experience, when someone is close to death their are other signs that show they are near the end: labored breathing; TIA's; strokes; coma; etc.  Have your father seen by a physician if you believe he is near the end so that he can die with dignity and with out pain and suffering.  Hospice can be a helpful option.