I just recorded a version of me singing it with death metal vocals and playing guitar and I sent it to a girl I like, will this woo her and will she want to have babies with me?

Let us hear it. We're all experts on love, we'll be able to tell.

Aren't the soft vocals what makes the song romantic in the first place? Can't imagine it with roars and growls.

[Blazingmonga]

Well, it was a romantic song!

If you're trying to scare her into liking you, then yes.

If romance is all about lyrics, then maybe.

Death metal vocals are probably not a good idea. Try some kind of spoken word for the lyrics, if you need them and aren't a particularly good singer.

You can "to share" with her all you like.
You can "to share" with her all you are,
just be a fine person!

Haha, great move!