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I personally would choose to go black and white or all colour. If you do selective colour on the flowers, you are drawing attention of the viewer directly to the flowers, not to the wonderful emotions/expressions on your face, and the flowers are not why you want to hang this photo up. It just seems like an odd thing to highlight. I would also use a more subtle way to highlight something.
I also agree that this may not be the best photo to hang up. I'm not sure if that is your kid and you wanted something with all 3 of you in it, but the kid looks disinterested and off to the side. If you love the expression of this one and the kid is not an essential part of why you chose this pic, maybe a cropped version is better?