Behind Your Back

To get to him, I need to use her.
I'll play her like a violin and have her falling in love with me before she even knows what's happening.
It will be easy. I've done it before and I'll do it again.
She's just a girl.A tool to get what I want.
When I'm done with her I won't think twice about walking away.
At least, that was what I thought.
Until I met her.