As I understand your situation, it is a condition of your bond that you not have contact with the minor. It is not a criminal offense to have contact with her, but it would be a violation of your bond for you to have contact with her. If you have contact with her and if the judge is presented with sufficient evidence that you have contact with her, then the judge can revoke your bond and you can be incarcerated pending trial. Unless you are brought back before the court to revoke your bond, there won't be evidence presented as to whether or not you contacted the minor. So bottom line, technically, it has nothing to do with your charges, but it can land you in jail if you violate the bond condition. Good luck.
It is up to the state to prove that you 1) interefered with the custody and 2) violated a condition of your bond to have no contact with her. For the second prong the State would have to file a motion to revoke your bond. For either of the these offenses I would encourage you to hire an attorney.
Your condition of bond prohibits you from contacting your gf until the misdemeanor charge is resolved. However, you may also be charged with felony Aggravated Stalking and face possible revocation of the original bond if you contact this girl. I suggest that until the case is resolved and she's 18 that you not contact her. You should consider keeping a close friend nearby in case the dad thinks you're trying to contact his daughter. It is not worth the risk of a felony charge to contact that girl!