Yes, it is THAT complicated!
I found this “map” of relationships which explores the variety of relationships that exist within the romantic and sexual realm of our communication. Polyamory, Monogamy, Swinging, Cheating, Open Relationships and other all have a place in this attempt to present the different options that we might often not even hear of.
Then again, every person brings more to the table and there are literally as many love styles as there are people on the Earth.
And this makes up for a vast field of exploration :P Doesn’t it?