Question about felonies?

My boyfriend has two felonies. I believe one is kidnapping and one is drugging the victim. These were his plea bargain from assaulting a cop. He is on probation for 7 years. He has completed 4 years with no problems. Do these ever go away? Is their to make them after he is done with probation? He's a great guy and the best boyfriend I've ever had. Please help!