I experienced a rollercoaster relationship of a different sort but I can identify. I wrote this tanka a couple of years ago about the time I was in a romantic relationship with a borderline. I titled it Twisted Relationships

"You are the greatest

You’re disgusting I hate you

Wait please don’t leave me

Thrives sowing chaos around

Rollercoaster ride from hell"

Decoder ring here if you or anyone else feels like reading it. https://medium.com/p/6c148e17f0d8