Fish and the boy both were lost, felt like they doesn't fit anywhere. Boy wanted to drown himslef because he was HOPELESS, BROKEN. But fish saved him?? TOOK HIM BACK TO THE LIGHT, BROWNED HIS SKIN JUST RIGHT, made him finally feel good??? +

He was alone, but didn't wanted be like this anymore because he found his fish and he wanted be happy with him (BUT HE HAD TO LET HIM GO even when he didn't want to tell him that he doesn't want to be alone anymore BUT HE HAD TO LET HIM GO)

'I can feel you take control
Of who I am and all I've ever known
Loving you's the antidote'
FISH EMBRACED HIM TO BE WHO HE REALLY IS AND IN LOVING HIM HE FOUND A CURE FOR EVERYTHING.

'And I know that you're scared
Because hearts get broken'

It's not the possibility of broken heart by the s/o. It's because of society and homophobes. They can hurt you deeply, and let you down. Told you that love like this would never last.

'I know that you're scared
Because I'm so open'

Things boy can already do and things his fish can't do yet. That what's scares him. Unknown. Not being sure about possible reactions from people who don't hear him screaming and have no idea what's really going on and who he is.

'So you wait for me in the sky'
Boy let fish go buy he knows that other he will wait for him. In the sky. LIKE FUCKING SUN DOES, IT'S ON THE SKY. ALWAYS.