Friends with benefits or relationship?

So me and my partner are going back and fourth about if the guy I was with prior to my current partner was a "open realationship".

I told him no it was friends with benefits but he's insisting it was a relationship. However he never met my parents, we never really hung out unless it was for sex and if I'm being completely honest we only had sex a few times. Doesn't sound like any type of "relationship" I would want.🤷🏼‍♀️🤷🏼‍♀️🤷🏼‍♀️ opinions?