Lyric discussion by itsokaye 

She was describing her love for a guy and how she still loves the guy. She was reminiscing those memories of him. "Loving him is like driving a new Maserati down a dead end street Faster than the wind, passionate as sin, ending so suddenly Loving him is like trying to change your mind once you’re already flying through the free fall Like the colors in autumn, so bright, just before they lose it all"

But then, they broke up. That's why it says "Losing him was blue, like I’ve never known Missing him was dark grey, all alone Forgetting him was like trying to know somebody you never met But loving him was red Loving him was red"

Summary: They broke up but the girl still loves the boy but he's already gone.

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