No, because you've deliberately misinterpreted what a love triangle is. Love triangle is a made up term. It means whatever the creator of the term and now society has accepted it to mean and that specific meaning is a situation when two rivals vie for the affection of a third person. If two men are interested in the same woman or two women interested in the same man, there is no homosexuality. The two rivals aren't interested in each other. That isn't what a love triangle is. Maybe you think it would make more sense that way, but that's not how language works.