I doubt that Walk Away and Who Knew are about the same person.
I think Walk Away is about Carey. Cause she told in an interview (http://www.youtube.com/watch?v=wKHNo2WNoPY) that when they argue he walks away rather than talking about it. And they've had their on-off moments.
Who Knew is about a friend of hers who died of an overdose. The '3 years' thingy is just a coincidence imo.
I doubt that Walk Away and Who Knew are about the same person. I think Walk Away is about Carey. Cause she told in an interview (http://www.youtube.com/watch?v=wKHNo2WNoPY) that when they argue he walks away rather than talking about it. And they've had their on-off moments. Who Knew is about a friend of hers who died of an overdose. The '3 years' thingy is just a coincidence imo.