His biographer said this in an interview in Salon magazine:
The relationship between Stevie Nicks and Tom seems complicated. Were they a couple? Co-workers? Friends?
I pushed on this question, saying to him, after he told me they weren’t a couple, “You sure sound like a couple.” Tom looked at me and said, “We had our times.”
https://www.salon.com/2015/12/13/bei...apher_partner/