Doubt doesn't mean doubt

I'm lying here in my bed, my lonely bed, 
Wishing you were here to share the soft down blanket and cuddle like we used to. 
As I lay here engulfed in my sheets, cursed to remember the past, of how happy we were in the past, how carefree we used to be. 
But now I can't help but think of our last conversation.

You know I say stupid things when I'm in doubt.
But I have to doubt this relationship, because amazing things like this only happen in movies.
I'm not having second thoughts about us,
 I just need confirmation that this is reality. 
The rest of my world is full of disappointment and lies,
I'm not used to having something good in my life. 
So I'm sorry if I doubt our relationship, it's only in my wildest dreams that I've ever been this happy.