HOW TO TELL SOMEONE I MUST BLOCK HIM?

No.6020813 ViewReplyOriginalReport
So, I have this art account on Instagram.

And I want to stay anonymous, like Batman. NO ONE IS ALLOWED TO EVER KNOW MY SECRET IDENTITY, unless it's a marketing consultant of course.

Then there's this dude whom I showed my art on my phone in real life, and he just looked up my name and followed me right then and there. So I fucked up. My secret identity has been discovered. I FUCKED UP AAAAHHHHHHHHH.
And now, I need to block him, change my username, and never EVER show my art to anyone, even if they're questioning how I'm even a real artist.

So... HOW do I explain to him that I have to block him?
Or should I just do it without warning, and see how or if he reacts? But then, what if he asks me for the reason? Should I tell him the REAL reason like I just told you guys?

WTF AM I SUPPOSED TO DO?!?