"'Stay' is a story about having love that close and wanting it to last forever," she says, discussing the song she sang at the Grammys this year, in the April issue of Elle UK, on newsstands March 6.
"You don't have that feeling with everybody, so when you have it, you don't want to let go of it. I would definitely say that [Brown] is the one I have that kind of relationship with."
Their level of devotion seems pretty high at this point: Rihanna celebrated her 25th birthday with Brown in Hawaii last month, and she accompanied him and his mother to court a few weeks before that when the L.A. District Attorney's Office was questioning the validity of the community labor he performed as part of his sentence for assaulting Rihanna in 2009.
Rihanna says that she and her on-again boyfriend want right now, more than anything, "a great friendship that's unbreakable. Now that we're adults, we can do this right. We got a fresh start, and I'm thankful for that."
Speaking of new beginnings, Rihanna also predicts to Elle that she'll "probably have a kid" five years from now, though first she wouldn't mind a good month of vacation.
"And [five years from now] I'll have set some things up so I don't have to tour for the rest of my life, even though I love touring. I want health and happiness in five years. I want to be healthy and happy," she says.
She calls the gun tattoos on her shoulders "symbols of strength" that signify she'll "never be a victim."
And, though she admits that her mom recently "went crazy" on her in response to a couple of nude photos (excerpts from an in-the-works photo book) of her posted online by a female friend, Rihanna says that she can't help but let it all hang out on Instagram.
"I instagram everything about my life," she says, "whether it's smoking pot, in a strip club, reading a Bible verse—how crazy, I know!—or hanging out with my best friend, who happens to be Chris."
"That's why I'm posting pictures of myself smoking pot, to tell the truth about myself," Rihanna explains. "I've got so much to think about, why bring all this extra s--t by being dishonest?"