Negra sombra - Luz casal

Esta canción originalmente es en gallego, pero conseguí una traducción al español en internet. Quisiera que alguien pudiera ayudarme a traducirla al inglés, cualquier corrección será bienvenida. Gracias!

Cuando pienso que te fuiste,
negra sombra que me asombras,
a los pies de mis cabezales,
tornas haciéndome mofa.
Cuando imagino que te has ido,
en el mismo sol te me muestras,
y eres la estrella que brilla,
y eres el viento que zumba.
Si cantan, eres tú que cantas,
si lloran, eres tú que lloras,
y eres el murmullo del río
y eres la noche y eres la aurora.
En todo estás y tú eres todo,
para mí y en mí misma moras,
ni me abandonarás nunca,
sombra que siempre me asombras.
Translation in english

When I think you left
Black shadow that amaze me
At the foot of my .....
You turn back at me, and you mockery.

When I imagine you’ve left
In the same Sun You Shows to me
And you’re the star that shines
And you’re the wind blowing.

If they sing, you are who is singing
If they cry, you are who is crying
And you’re the murmur of the river
And you’re night and aurora.

You’re in everything, and you’re all
To me, and you live inside of me
And you’re never going to leave me
Shadow that always amaze me.

When I think you left
Black shadow you amaze me
At the foot of my pillow
You turn back and mock me.

When I imagine you’ve left
Even in the sun you show yourself to me
And you’re the star that shines
And you’re the wind that blows.

If they sing, you are who is singing
If they cry, you are who is crying
And you are the murmur of the river
And you are the night and the dawn.

You’re in everything, and you are everything
To me and inside of me you do live (dwell)
And you’re never going to leave me
Shadow you always amaze me.

Gracias! Thank you very much!

Cuando pienso que te fuiste,
When I think that you left,
negra sombra que me asombras,
black shadow that amazes me,
a los pies de mis cabezales,
At the foot of my pillow
tornas haciéndome mofa.
Your turn back and mocking me.

Cuando imagino que te has ido,
When i imagine that you've left
en el mismo sol te me muestras,
you show me your seld inm the sun in self
y eres la estrella que brilla,
and you are the start that shines
y eres el viento que zumba.
and you are the wind that blows.

Si cantan, eres tú que cantas,
If they sing, is you who sing,
si lloran, eres tú que lloras,
if they cry, is you who cry,
y eres el murmullo del río
And you are the murmur of the river
y eres la noche y eres la aurora.
And you are the night and you're the dawning.

En todo estás y tú eres todo,
You're in everything, and you are everything,
para mí y en mí misma moras,
To me and and inside me you stay (lives)
ni me abandonarás nunca,
and you will never leave me,
sombra que siempre me asombras.
shadows that always amazes me

I'm not sure about, it's based in your translations.. I just change little things (My english is not good)