Hi Bryan,
Just a couple of things I noticed. His right shoulder is too wide and too high. Also, the shape of his hair, particularly on his right side, is too flat.
I suggest you get a sheet of clear acetate and a fine black marking pen and trace the important lines from the photo. You can then hold it up in front of your painting at a distance and see for yourself exactly where those lines should go.
You certainly have a likeness but the disadvantages of your source photo are that it is taken front on, the image is tilted and it is lit by flash, all of which makes the job a lot harder.
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