If the person suffered an aggravated injury such as a broken jaw, you could be charged with either an aggravated assault which is a misdemeanor offense which usually carries with it a one year jail sentence, or a more serious charge of assault with intent to do great bodily harm, which is a felony charge and can carry with it a longer prison sentence. The State is obligated to continue with the prosecution, even if the victim does not want to go forward. Often times, if the victim is the only evidence the prosecution has, and that victim fails to come to court or refuses to prosecute, with no other evidence, this case may end up being dismissed. Due to the serious nature of the charges, you may want to consult a criminal defense attorney in your area to evaluate your case and your available defenses.