Lyric discussion by athomeintheclouds 

I honestly don't think it's about someone who is literally bi-Polar.

I think it's more like, you can never tell from one day to the next whether they'll be in love/together (hot) or at war/apart (cold).

as in, they have no clue whatsoever whether they wanna be together or not. they can't stay in the relationship long enough to figure out if they're a good coupel or not.

@athomeintheclouds I'm inclined to agree, seeing as the song says "love bi-polar", implying it's particularly in terms of their relationship.

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