Thanks for the responses ladies..
I entered my first relationship two months ago of the last 10 years. I wasn't sure if this was normal behaviour in the social media age of dating.
His ratio of Instagram model following is 3:68.
I don't particularly LIKE it, but wasn't sure if I was overreacting. I haven't brought it up. I'm sure he'd unfollow if I asked, but I wonder if it's pointless seeing as he could just check the accounts anyway without following.
ETA: He's 29.