Polyish

Polyish: A space between polyamory & monogamy that is intense & intimate loving "friendships." Neither poly nor mono seems to fit. This is different that what is often labeled monogamish, a term that can often mean occasional sexual nonmonogamy.

Polyish relationships tend to be medium to long term, but don't have to be. They are emotionally intense & intimate relationships with people we love, whom we are committed to being there for, spending time with, loving, being emotionally vulnerable to, supporting, and nurturing each other in a way that would be culturally inappropriate in a monogamous context. Polyish friendships are not what some poly folks would consider to be polyamory. They may choose the label friends, but seem like more than friends, tends to have have some romantic alchemy, but not what is considered partners in a sexual or poly context.

I have also called this polylite.

This is similar to the quasiplatonic (aka queerplatonic) except that quasiplatonic tends not to have any or much romantic alchemy.