If he keeps pressing you about it, leave him in the dust. It means he's too paranoid and people like that usually have something to hide and are projecting their own issues onto others. There are plenty of people out there who don't want attention from strangers and have very little to no social media presence. 60 followers is normal for a real person, nobody has more than a handful of real friends and family they stay in touch with.
People who post their business and pictures online are in threat of getting the evil eye or being catfished, nothing good comes out of it. Good for you for being low-key.