love bipolar 

When you fluctuate between loving and hating someone like a swinging pendulum

Eric: My girlfriend is such a love bipolar, I can never tell when her mood will change

love bipolar by Avelina November 2, 2013

Bipolar Love

So when two people love each other so much they sometimes don't know whether they love or hate each other because it's an ongoing cycle

Bobby and Tina got bipolar love.

Bipolar Love by Getchahighright April 16, 2017