Feelingship 

"When you develop unresponsive feelings crush for a friend"

"One of my friendships turned into a feelingship for one of my best friends"

Feelingship by Wolfyie June 2, 2016

Flingship 

A friendship that has a potential to be a fling.

JD, you should totally start a flingship with Eliot. She's like your best friend and she's totally banging material.

Flingship by Eliot Reed November 27, 2011

flingship 

A flingship is a platonic friendship, usually of two females, characterized by the same parabolic curve of interest and intensity that defines classic romantic flings. Flingship participants spend increasing time together, followed by an intense crescendo, then an abrupt (and often painful) fizzle. Flingships, which are frequently born of the common interests of work or school, are common in big cities with high transplant rates, such as San Diego and NYC.

Erin and Jamie meet in physics class, where they become fast friends, drawing naked pictures of the professor and going to the coffee cart during breaks. They begin to go to happy hours together, text during work and introduce each other to friends and family; they are almost considered best friends...and then suddenly, when the term ends, they cease spending time together almost entirely.

Flingships also terminate when said "friend" sleeps with other friend's significant other.

flingship by Dr. Evil 518 December 7, 2010