system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] I'm confused about GOTG2, and celestials (Possible Spoilers)

You are a celestial? a God... no god little g

If he is alone in the universe; how is he known as ***a*** celestial?  Are other celestials out there and like him? Or is he just a little schizo.
gpt
Ego famously a little crazy, so it's true to comic character.

In comics, Celestials and Ego are completely different things.  

GotG2 Ego does not look like the Celestial pictured in GotG1 or the head of Knowhere (which in the comics Is the head of a Celestial).

He may be the same life form as them, or he may be mistaken.  He may be an outcast or something completely unique and different. After all, when you're all alone, who can say you're wrong?

Perhaps Inifinity War will show us more.