This might sound dumb, but seriously though.

How do you stop someone from following you on Instagram? I ok'd his request years back when he was just someone from school, but he's now my ex best friends ex husband who had a weird thing about me. He's gross! I'm married blah blah blah! Anyways, he used to creep me out majorly, but I was nice and ignored it. But I can ignore it. I don't want him to have access to my photos anymore. I already denied him on FB mind you he kept sending me request as I deleted them. Help!!!