I just don't know what to do.

I'm brand new here. I have some serious problems and just have no idea what to do. My husband was diagnosed with ADHD, OCD, and turrets syndrome when he was about 13. He has outgrown the ticks from turrets, but everything else is in full swing. No one felt that it was important to tell me that he had ADHD before we got married. Even speaking to his mother, she said, oh well you loved him anyway so I didn't think it was important. Now, 3 1/2 years and two children into it, I find out. All of the heart ache I've endured since we got married, from what I've read anyway, has been related to his disorder. When I found this out, I was relieved and very willing to work on anything we could to save our relationship. Problem is, he refuses to believe ADHD has anything to do with our problems. Actually he doesn't think we have problems and thinks it's laughable that I think we do, and thinks I'm crazy for trying to get us into coucelling. He's very sensitive about it all. He tried medication when he was young and first diagnosed and hated it and has since refused to take medication for it. I don't know what to do. I love him, but seeing how he treats our children, how he treats me, I don't know how much longer I can stay. I feel broken. That's the best way to describe how I feel. I used to be such a happy person, now because of all his negativity, I feel depressed most of the time. I don't want to go on repeating all the issues we have, as many of you know the things that happen in a relationship with someone with this disorder. Is it selfish that I want to leave him? He can't help that he thinks differently and reacts differenty than me, and I can't seem to be ablest stop feeling neglected and depressed with how he treats us. Any advice would be immensely hepful. I'm just at the end of my rope. I don't know what to do now. I feel as though I've tried everything I can, but I'm getting no help from his end.