I must say something too. aDHD does not progress to bipolar disorder, they are completely separate issues. He is an abuser and as pointed out already it is a deliberate action since he hides it from your family. Stay far away from him. Do not attribute his abuse to ADHD there are many. Many people with ADHD and even bipolar that do not abuse their partners. He abuses his partners because he gets something out of it. He is unlikely to change that unless he get specific help that deals with domestic abuse.