The first bit doesn’t really sound familiar on a first read, though it may be a paraphrase, and he has talked about them ‘sort of’ being together, in that their ending wasn’t as clear-cut as John and Christine’s. The second part sounds a little bit like a quote from STEVIE in Rolling Stone, though it often gets attributed to Lindsey.
"That’s where the double-edged sword came," Nicks says, "whether he wanted to help me or not: ‘So, you don’t want to be my wife, my
girlfriend, but you want me to do all that magic stuff on your songs. Is
there anything else that you want, just, like, in my spare time?’"