I think this song is most likely to be about a relationship with someone.
"I'm cured when you say there's something left"
By this the other person is telling him they still have feelings towards him.
"It's pure just to know we'll always be friends"
No matter what's happened between them, and whatever else happens, they'll always remain as friends at the very least.
"I hope, I hope you find your mind and let them go"
He hopes they think things through enough to let everything go that may have happened between them before, and go on anew.
"There's nothing left to do in this town
There's nowhere left to fly but on the ground
I'll reach you, tonight"
There's nothing exciting to do where they both live, so he'll see this other person and no matter what they do they'll enjoy themselves.
"It's opening but I cannot describe it
My friends, you know that I can't hide it"
The strong feelings are showing for the other person, and he can't hide them as they're so strong.
"Like planets, it spins around my world
A painting, all the colours running dry like me"
The feelings and emotions are always with him and on his mind, and 'all the colours' are actually the feelings/acts he was using to hide his true feelings. Showing nothing but what is truely there, no fake representation.
I think this song is most likely to be about a relationship with someone.
"I'm cured when you say there's something left" By this the other person is telling him they still have feelings towards him.
"It's pure just to know we'll always be friends" No matter what's happened between them, and whatever else happens, they'll always remain as friends at the very least.
"I hope, I hope you find your mind and let them go" He hopes they think things through enough to let everything go that may have happened between them before, and go on anew.
"There's nothing left to do in this town There's nowhere left to fly but on the ground I'll reach you, tonight" There's nothing exciting to do where they both live, so he'll see this other person and no matter what they do they'll enjoy themselves.
"It's opening but I cannot describe it My friends, you know that I can't hide it" The strong feelings are showing for the other person, and he can't hide them as they're so strong.
"Like planets, it spins around my world A painting, all the colours running dry like me" The feelings and emotions are always with him and on his mind, and 'all the colours' are actually the feelings/acts he was using to hide his true feelings. Showing nothing but what is truely there, no fake representation.
That's what I think anyway.