First Song Almost Done

I've reworked my first demo, and a couple days ago figured out the lyrics. Now I'm just perfecting singing it, and playing it acoustic, before I record the final demo version. I'm going back and forth in my mind how much extra I should put in an acoustic song demo. Since it is a demo. I'll just do what I can I suppose. I'm also throwing around the idea of doing a cover. There are a few I can think of. 

My first song is a short one. Here's the lyrics (if I change them i'll update)

Your heart to full to love,

And make love

With any other.

Not even the earth

Can have your body now.