Invisibility is my superpower

I am but just the background 
White noise; like I make no sound 
Feels no different if I’m around 
If I was missing, doubtfully be found 
Could be behind you, just turn around

Not that you would know 
Won’t say anything, like water let it flow 
Silently disheartened; little to my glow

Tried to show you, I tried to show-
Yet all of this, you’ll never know