Some constructive criticism here, so please don't mind me. You seem to have some potential but personally I think there are a few tips you should keep in mind. One, it is perfectly fine to have confidence in your abilities, but there is a fine line between confidence and arrogance. In a group setting, people aren't looking for the star of a show, but more so someone who is their equal. I personally like the sound of your voice, but the way you carry it feels like you're trying too hard to be mature. You have a sweet sounding voice and I think something more natural would suit you better. As far as your singing, you were really, really breathy and that doesn't fit the original feel the song is supposed to have. Adding your own touch is fine but making sure it still fits the song is something you should keep in mind. You have a good voice, try to find something that suits it and you'll be set.