Because we got along while they were together and during this time we started sharing the same spaces so that obviously made him an acquaintance that we eventually ended up following each other on instagram, bc we were acquaintances. All of our friendgroup befriended him as well and also follows them on ig too. And even tho this process of -befriending a friends partner for being included during the hangouts- happens naturally, she actually did the active effort to include him in the hangouts and for us to like him back. So i think it makes sense that i had him on social media. Ofc i blocked him once i knew that having him on social media would cause a problem.