I Need Some Help On How To Deal With A

I need some help on how to deal with a man with untreated ADD. He's says he has it under control, but in reality its killing our relationship. One minute things are great and then the next something will set him off and he's yelling at me. He has mood swings all the time. We workout regularily and eat healthy but he is always tired and achy. Not sure if that is a symptom or not but it creates conflict in the bedroom. I feel like no matter what I say or do he is never satisfied. I will admit that I don't always keep my cool when he is having a mood swing. I try really hard to stay calm but it's becoming more and more difficult. Any advice?