Only a matter of time before I'm replaced

I love a man
who will eventually figure out my worth.
I'm not special
Just replaceable
I don't wanna lose him
I don't want to let go
He makes my world move
He puts a smile on my face
To lose him would only cause a tragic fate
Though everything has an excuse for him
To busy for me
I wonder how long till he grows tired of me
How long till he doesn't care about me?
How long till my world shatters again?
He is my everything
I want to be in his arms and kiss him
I want to see his smile
To feel his arms wrapped around me
I want to be happy without worry
Without a moment of doubt
Without that moment where I want to cry
when we don't talk or have to say good night