Step 1: First open any image.Here i worked with one of my favorite celebrities photo.

Step 2: Duplicate the layer by pressing Ctrl+J. Now apply the desaturate on the duplicated layer. Go to Image> Adjustments> Desaturate or press Ctrl+Shift+U.Then set the duplicated layer blending mode to 'Lighten'

Step 3: Duplicate the original background layer and place to top of the layer palette.
Go to Filter> Noise> Add Noise and set the amount 4% , Gaussian and Monochromatic.

Step 4: Set the Background copy 2 layer blending mode to 'Soft Light'.

Step 5: Again duplicate the original background layer and place to top of the layer palette.
Go to Filter> Blur> Gaussian Blur and set the radius level 6.0

Step 6: Set the Background copy 3 layer blending mode to 'Overlay'.
And here is the final result


So what about your girlfriend photo.