May I be so bold as to offer a couple of words of constructive criticism and advice?
You have a lovely model, lovely smile and like you said, the colours are really nice with the hair and the necklace to go with the dress....that all works really well. I like her smile and fun pose too....really lovely. The basis of a very nice image.
But, a couple of things. Firstly, the shot is very underexposed, probably by about a stop and a half I would say. Might be worth checking the histogram in your processing software as I would imagine that the curve is way down on the left or the middle. You have a white background, so the curve should be much further to the right.....bring this up and those colours would really scream off the page I reckon. At the moment, they are very muted and a touch grey and its a shame as they, like I said and you have yourself, are really nice.
Secondly, the image is focused in completely the wrong place. The focus with 95% of all portraits should be on the eyes and the focus on this is on the hand BEHIND her, so everything in front, including the face and eyes, it out of focus....which then in turn loses the detail of those lovely eyes and makes it look quite blurred. You have a nice camera there (the 1000D is a lovely bit of kit, I have its bigger brother, the 7D and most of the electronic internals are quite similar), so getting the correct focus point shouldn't be a problem. Either focus, half press and recompose or move the focus point around the viewfinder to the point where you want and shoot away. If you have a chance to shoot with this lady again, do so and recreate the image, but take into account the use of the histogram....never rely on the screen on the back as it will always give you a false impression.
This is the basis of a really nice, fun and lovely image, but with a few tweaks, you would have a killer shot. Hope you don't mind as I can see real potential in this