Not welcomed at your planet

No, I'm not welcomed at your planet,
I'm just an alien bystander.
The hundredth time I do surrender.
The hundredth time cannot forget it.

This one is gonna be for sure...
No turning back, no chance, no sorrow.
The future's gonna be so pure
Today. No waiting for tomorrow.

Untravelled galaxies are waiting.
Goodbye, the Universe of Doubt.
I'm getting off this hopeless ground.
Is it the loss to cry about?