Ambiamorous

Ambiamory is defined as the ability to enjoy both monoamory and polyamory with little to no preference between the two. This is not a type of relationship, but rather a specific feeling one may have towards relationships. An ambiamorous individual may have only one partner, or they may have multiple. In the case of having multiple partners, consent from all individuals involved is required. Everyone has to be aware that their partner has other partners, and they also have to express that they are okay with it, otherwise it's simply cheating.

You can read more information about this at LGBTQIA+ Wiki!