What does she mean to me?

I'm not sure I really know.
A rebound? Not really.
A girlfriend? That's silly.
But within my mind this grows.

She walks around without a care
I can't determine what's really there
If I'm the one who makes her happy
Or if it's just my body bare

It's a game I don't like playing
The only one of its kind
Despite whatever it is I'm saying
I cannot get her off my mind

"Nothing serious here, its just good fun"
Is what we will both echo
I'm not sure for her but I for one
Am not scared of where this goes