Should I reconnect with them?

I was really good friends with this person since I was younger around 9 years ago (2017). He used to make comics and skits, which was something I really like. We talked all the way up until the pandemic hit and that when we drifted apart. I knew their cousin as well and I also drifted away from her at that time. I reconnected with the cousin 4 years later and added her on ig. I saw that my old friend was recommended to me on there but I was hesitant to add them bc I never asked their cousin if that was ok. (we are all the same age)