I was briefly involved in a love rhombus.
it involved GBG (Gorgeous Ballet Girl), GBGLDB (Gorgeous Ballet Girl Long Distance Boyo), yours truly and SSRM (Somewhat Shady RoomMate)

So I had a thing for GBG, but upon finding out about GBGLDB decided to do the marginally classier thing of being a little bit cautious and subtle.  SSRM had no such qualms and weighed right in, and due to scruffy shadiness (which I can only hope to one day achieve), swept GBG off her feet.It got far too complicated and so its back to a love triangle.

Love polygons suck.