Why is it just a dream?

I dream of you every night,
and then I wake up
       alone.
Why can't it be real?
Why is it just a
        dream?
I dream of being in your
arms, and I awaken
        alone.
Your embrace is so warm,
loving, but i awaken
         cold
I rush to my bed at night
hoping to dream of
        you,
And night after night, I wish you
will kiss me for real, but you
        can't,
For no matter how many times I Dream,
my wish never finally becomes
        true.
So tell me this,my love,
why is it just a
          dream?