Similar to a love triangle, this is a convoluted mess of infatuation in which three people are competing for one persons affection. (a square is when everyone has a thing for each other, and a trapezoid is similar to a rhombus, but involves one homosexual)
Janet: "so Josh told me that he loves me!..but so did Jim...and Jeff; I just don't know who I want!"
Jane: Woah there caught in a little love rhombus, eh?
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