Now that I think about it, perhaps Vartann/Cath/G-man is the love triangle Elisabeth was referring to in her interview. She never said the love triangle involved her character... and technically if Greg liked her, but she liked Nick and if Nick did like her (which it doesn't appear he does in that way), that would be more of a love circle than triangle (according to urban dictionary). Love triangles are usually when one person is torn between two others. So if Cath is torn between Lou and the G-man, that is a proper love triangle.
Oh yeah, I had forgotten about that, you might be right