My sun and air

There is so much I can say,
But I only say a little
I know I should speak out
But I am afraid,
Afraid that you will hate me.
You are my sun and air
When you're not with me
I am cold.
When you are in pain
I feel it.
If I say what I need to say
Will you leave me?
Will I ever hear your voice again?
I don't want to hurt you
That is my excuse
But it is to protect myself,
Protect myself from losing you
For I am selfish.
You are my sun and air
When you're with me
I am warm
I can breathe and see clearly,
So I will never say what I need to say
For I cannot lose you.
I will be a cold empty shell
I am selfish and afraid,
Afraid to say what I need to say
And selfish because I cannot lose you.
You are my sun and air
If I say what I need to say
And you leave me
I will not just be cold
I will be dead.