GOSH I LOVE THIS!!! spoilers below
the concept is soooooo GOOD!! I love how you wrote/presented his "friends". it kept me guessing of it the text changing was intentional or not - if it was just a bug. but no! the slow reveal that they aren't real was written soooo well... I love how you didn't TELL us that, you SHOWED us! I loved the subtle hints too
in the end MC(do they have a name? I think it was said but I can't find it again...) told us that Mr X. and presumably the rest weren't real but still, it was so satisfying to have my tiny theories be true
yeah yeah that's a really simple thing to obssess over but I don care, I like it!
also that cliffhanger was criminal. I WANT MOAAAR!!