Can the phrase "reveling in the past" also mean "to live in the past"? Also, is it spelled "reveling" or "revelling" as the online Merriam-Webster dictionary shows it both ways?
To revel in something means:
This is not quite the same as living in the past:
To live in the past implies more of not paying attention to one's current situation. To revel in the past implies that one derives enjoyment from it, but not that the person is so absorbed that they don't pay attention to current situations.
As to the spelling: reveling is the American English spelling; revelling is more often used in British English.