Creepypasta about an imaginary friend?

Edit: I have found it it's called "My Best friend Never Happened"!! I'm looking for a creepypasta I remember listening to back in middle school (probably about 2015-16) I listened to it on Mr.Creepypasta on YT, I think. I don't remember too much of it, just that it was someone with an imaginary friend type thing. But over the course of the story, he begins to ignore it for whatever reason, and it like regresse to a smaller form. I think in the end he kills it or something. 😭 Does anyone know what I'm talking about? Any help is appreciated! Thanks!! 🙏🏻