I Ask This Of you

I thought of the title, I went on from there. First person from the 10th Doctor's point of view. Just thoughts, maybe when the Doctor's asleep in 'Christmas Invasion'. Maybe? Dunno.
I don't own Doctor Who, so only the ideas mine. Not the characters, or plots or places. Just this single idea.

Rose, I ask this of you. That you'll never leave me, not ever. Even if I say you should. Go to another place, go home safely. I'd give my all to you. My heart and soul but it's not enough. I'd give my life for you, I did once before and I'd do it again, and again. I've had friends like you, but not like you. Never as wonderful as you. When you smile it's like the centre of the TARDIS, when you talk its histories voice calling to me. Yes, you're the one who mended me after the hurt and pain that ripped my heart in two. So I give it to you. Just never leave. Stay with me. Rose, that's all I ask of you.