actually what you did is great.
Maybe u didn't satisfy enough due to its color and blending.
It looks so red. Remember when you look at a fire you can see
different sets of color in a flame. There is blue, violet, red, orange and
yellow.
try these methods and see which one suits you best
http://www.tutorialized.com/tutorial/Fireball-Fire-or-Explosion/7751http://www.tutorialized.com/tutorial/Ring-of-Fire/10125for the guy...you should add more lighting and shadow to get the effect.
Since the fire is on left then shadow should leaves to the right.
try adding some yellowish tone on the face, hair and clothes which are facing the flame.
hope this would help you