Not what i expected

I've got a vision in my head
Of how it should be
And I wonder if that's how
It will work out
When I sit down will I be smiling
A grin on my face
Or will I just want her to
Get out of my head and my mind
That's how it goes
And then she shows
And it's all wrong
I feel her hand touch on my arm
And my skin grows cold
How can this be
Why's it so fake
And why's it so false
How should I tell her
She should go
Cause it's all my fault
I let my heart get ahead
Of my mind and everything else