What if your future child can time travel, and came back in time because you died and they wanted to know you, so now they’re a part of your life and you don’t even know it? Amirite?

Ummm.. Back to the Future ringing any bells?

I'm thinking Rini from Sailor Moon here

Your best friend could be your future kid.

I would argue this point, but my brain just imploded.

Melody Pond maybe? At least to some extent?

I'd be really embarrassed if they secretly watched me...

But wouldn't they alter the past so then by knowing them you might end up not having a kid with their other parent and then the kid would not exist?

then my life would be weird

I just turned around to see if anyone's watching me LOL